On Appeal from the United States Bankruptcy Court for the District of Delaware (Bankruptcy Court No. 23-11069) Bankruptcy Judge: Honorable Craig T. Goldblatt

Argued June 25, 2025

Before: SHWARTZ, MONTGOMERY-REEVES, and AMBRO, Circuit Judges

(Opinion filed: September 16, 2025)Page 2 Shirley Chan Kirkland & Ellis 333 W Wolf Point Plaza Chicago, IL 60654

George W. Hicks, Jr. [ARGUED] Kirkland & Ellis 1301 Pennsylvania Avenue NW Washington, DC 20004

Laura D. Jones Peter J. Keane Pachulski Stang Ziehl & Jones 919 N Market Street P.O. Box 8705, 17th Floor Wilmington, DE 19801

Counsel for Appellant Yellow Corporation

Nicholas J. Caluda Quinn Emanual Urquhart & Sullivan 700 Louisiana Street Suite 3900 Houston, TX 77002

L. Katherine Good Maria Kotsiras Potter Anderson & Corroon 1313 N Market Street 6th Floor Wilmington, DE 19801Page 3 Derek Shaffer [ARGUED] Quinn Emanuel Urquhart & Sullivan 1300 I Street NW Suite 900 Washington, DC 20005

Eric D. Winston, Esq. Quinn Emanuel Urquhart & Sullivan 865 S Figueroa Street 10th Floor Los Angeles, CA 90017

Counsel for Appellants MFN Partners, LP and Mobile Street Holdings, LLCPage 4 Samuel I. Levin Edward J. Meehan [ARGUED] Groom Law Group Chartered 1701 Pennsylvania Avenue NW Suite 1200 Washington, DC 20006 William D. Sullivan Sullivan Hazeltine Allinson 919 N Market Street Suite 420 Wilmington, DE 19801

Counsel for Appellees New York State Teamsters Conference and Retirement Fund; Road Carriers Local 707 Pension Fund; Management Labor Pension Fund Local 1730; Mid Jersey Trucking Industry and Teamsters Local 701 Pension and Annuity Fund; Teamsters Local 617 Pension Fund; Trucking Employees of North Jersey Pension Fund; Freight Drivers and Helpers 557 Pension Fund; Teamsters Local 641Pension Fund

Brad R. Berliner [ARGUED] Andrew J. Herink Daniel E. Sullivan Central States Funds Law Department 8647 W Higgins Road 8th Floor Chicago, IL 60631Page 5 William A. Hazeltine Sullivan Hazeltine Allinson 919 N Market Street Suite 420 Wilmington, DE 19801

Counsel for Appellees Central States and Southeast and Southwest Areas Pension Fund

Emily J. Allender John Ginsberg Benjamin T. Kelly Kartar Khalsa Rebecca L. Stark Stephanie Thomas Andrew P. Walker [ARGUED] Pension Benefit Guaranty Corporation Office of Chief Counsel 445 12th Street SW Washington, DC 20024

Counsel for Appellee Pension Benefit Guaranty Corp.

Page 6OPINION OF THE COURT

AMBRO , Circuit Judge

Yellow Corporation, 1 once one of the nation's largest trucking companies, went out of business and filed for bankruptcy in 2023. As part of that winddown, it withdrew from several pension plans that secured retirement benefits for Yellow's union workforce. In the bankruptcy, those plans came looking for what they believed they were owed, filing claims against the estate for Yellow’s withdrawal liability— what it must pay to the plans for its early exit. Of course, Yellow and the plans disagree on the amount of that liability. And here we are.

Mine-run bankruptcy disputes are about money, but this one is mostly about administrative law. In the midst of the COVID-era economic downturn, Congress granted billions in cash to struggling pension plans through the American Rescue Plan Act of 2021 (ARPA). But the money came with a catch— Congress charged a federal agency, the Pension Benefit Guaranty Corporation (PBGC), with the task of promulgating Page 7regulations that would impose “reasonable conditions” on how the pension plans would account for and use that money.

We consider two of those regulations in this appeal. Their upshot is this: The money Congress granted to the plans does not fully count in calculating what Yellow owes to the plans upon its untimely exit. A bigger deficit to fill, a bigger bill to pay. In the Bankruptcy Court, Yellow argued those regulations flouted the statutory scheme that normally governs withdrawal-liability calculations, impermissibly inflating the amount it owes the plans. After the Bankruptcy Court upheld the regulations, we granted a petition for direct appeal of its order on these novel issues. Now, we affirm that order.

Two storylines blend together in this appeal: ARPA and the bankruptcy of Yellow. First, for some context on our dispute, we go back to the enactment of the Employee Retirement Income Security Act of 1974 (ERISA), 29 U.S.C. § 1001 et seq. , the early days of the PBGC, and the subsequent enactment of the Multiemployer Pension Plan Amendments Act of 1980 (MPPAA), id. § 1381 et seq .

Congress enacted ERISA in 1974 to protect retirees' pension benefits. Among the main purposes of this 'comprehensive and reticulated statute was to ensure that employees and their beneficiaries would not be deprived of anticipated retirement benefits by the termination of pension plans before sufficient funds have been accumulated in the Page 8plans.” PBGC v. R.A. Gray & Co. , 467 U.S. 717, 720 (1984) (quotation omitted).

To serve that purpose, Congress established the PBGC. A federal agency and corporation, it operates “a plan termination insurance program” that “collects insurance premiums from covered pension plans and provides benefits to participants in those plans if their plan terminates with insufficient assets' to cover what the participants are owed. Id. As detailed below, Congress gave the PBGC wide regulatory authority to achieve this goal. It may issue “regulations as may be necessary to carry out the purposes” of ERISA. 29 U.S.C. § 1302(b)(3). As relevant here, those purposes include “encourag[ing] the continuation and maintenance of voluntary private pension plans” while “provid[ing] for the timely and uninterrupted payment of pension benefits to participants and beneficiaries.” Id. § 1302(a)(1)-(2).

The PBGC insures both single-employer and multiemployer pension plans (MEPPs). R.A. Gray , 467 U.S. at 720. Here, our concern is just the latter: employee benefit plans to which multiple employers contribute through collective bargaining agreements with labor unions. 29 U.S.C. § 1002(37)(A).

At first, ERISA and the PBGC created a kind of moral hazard in MEPPs. When an employer withdrew from a plan, the remaining employers in the MEPP would be responsible for making up the shortfall. Realizing this would increase their burden, other employers would also withdraw, leading to a run-on-the-bank-type spiral as more and more employers withdrew. The financial burden then would fall on the PBGC to fill the gap.

Page 9As a remedy, Congress enacted the MPPAA to impose withdrawal liability on employers that left MEPPs. If an employer chose to leave, then it—rather than the employers remaining in the pension plan and the PBGC—would be on the hook for the departing employer's portion of the shortfall. Peick v. PBGC , 724 F.2d 1247, 1267–68 (7th Cir. 1983). By expanding on the initial grant of authority under ERISA, the MPPAA gave the PBGC additional authority relating to withdrawal liability, including the power to prescribe “actuarial assumptions” for calculating that liability. 29 U.S.C. § 1393(a).

Under the MPPAA framework still operative today, a withdrawing employer is responsible for its proportional share of a plan’s “unfunded vested benefits.” 29 U.S.C. § 1381(b)(1). The formula for calculating a plan’s unfunded vested benefits is deceptively simple: the value of the pension benefits vested (and thus owed) minus 'the value of the assets of the plan.' Id. § 1393(c). In other words, the unfunded vested benefits are the difference between the plan's vested benefits and the plan’s assets . We say “deceptively” simple because the definition of a plan “asset,” and the ways statutes and regulations interact to form that definition, are the core questions here.

There is a limit to this general “proportional share” rule. Per the MPPAA, an employer's total withdrawal liability is amortized into “level annual payments” that are roughly equal to the payments owed in the recent years before the withdrawal. See 29 U.S.C. § 1399(c)(1)(A). But an employer’s liability is capped at 20 years' worth of such payments-in effect, setting a maximum amount of liability . See id. § 1399(c)(1)(B) (“In any case in which the amortization periodPage 10 . . . exceeds 20 years, the employer’s liability shall be limited to the first 20 annual payments . . . .'). Still, akin to the operation of an acceleration clause in a standard loan agreement, those annual obligations can be accelerated if the withdrawing employer defaults on the payments. Id. § 1399(c)(5).

The MPPAA helped, but did not heal, the financial condition of MEPPs. Decades later, COVID made things worse. To respond to the financial crises caused by the pandemic, Congress enacted ARPA to shore up the nation’s struggling pension system. See generally ARPA, Pub. L. No. 117-2, § 9704, 135 Stat. 4, 190-99 (2021).

Through that law, Congress appropriated funds, deemed “special financial assistance,” to support MEPPs. The money would enable receiving plans to pay full pension benefits through at least 2051. 29 U.S.C. § 1432(j)(1). To achieve this goal, Congress instructed that the special financial assistance funds could be used only “to make benefit payments and pay plan expenses' and must be 'segregated from other plan assets.” Id. § 1432( l ).

Congress delegated to the PBGC the authority to solicit applications for these funds from MEPPs, distribute the money, and issue regulations that placed “reasonable conditions on a[] . . . multiemployer plan that receives special financial assistance,” including conditions related to the 'allocation of plan assets' and 'withdrawal liability.' Id.

Page 11§§ 1432(a)(1), (m)(1). At the same time, Congress listed several specific areas that the PBGC could not regulate, like plan personnel, plan governance, and the funding of and accounting for plans in “critical” status. Id. §§ 1432(m)(2), 1085(e)(8).

After notice and comment, the PBGC promulgated the two challenged regulations before us. 29 C.F.R. § 4262.16.

The Phase-In Regulation prohibits MEPPs from fully counting special financial assistance funds as plan assets all at once. MEPPs must instead phase in those funds. Id. § 4262.16(g)(2)(viii). In this way, the funds are added incrementally to the plan-assets calculation, the rate determined by the number of years it would take the MEPP to exhaust the special assistance funds, as stated in the plan's application. Id. § 4262.16(g)(2)(ix)-(xii).

As a simple example, say a MEPP received $100 million in ARPA special financial assistance, and in its application projected it would take five years to exhaust the funds. The Phase-In Regulation requires that in the first year only $20 million of those funds are counted as plan assets. In the second year, $40 million would count, and so on. This regulation affects withdrawal liability, as an employer that withdrew later would calculate its liability against a bigger base of plan assets, offsetting the amount owed.

The No-Receivables Regulation restricts MEPPs from recognizing as an asset any awarded special financial assistance before the funds are paid to the plan. Id. § 4262.16(g)(2)(xiii). Like the Phase-In Regulation, this regulation bears on withdrawal liability, as an employer (like Page 12Yellow here) that withdrew after the award of funds to a MEPP, but before their actual receipt, would face withdrawal liability that did not account for any special financial assistance funds.

The MEPPs involved in this appeal applied for special financial assistance under ARPA between 2021 and 2022. Collectively, they were awarded $41.1 billion in special financial assistance.

Unable to resolve a protracted labor dispute with the Teamsters union, Yellow shut down in July 2023 and filed the underlying bankruptcy cases the next month.

Eleven MEPPs are part of the dispute here. Those eleven filed 174 proofs of claim in the bankruptcy case, seeking a combined $6.5 billion in withdrawal liability. For varied reasons all involving the challenged regulations, the pension plans did not include all the special financial assistance funding in their determinations of Yellow’s withdrawal liability.

For example, Central States, the pension fund with the largest proof of claim at issue, received its special financial assistance funds in a lump-sum payment on January 12, 2023. For its proof of claim, Central States calculated withdrawal liability “as of the end of the plan year preceding the plan year in which the employer withdraws,” like the MPAA requires. 29 U.S.C. § 1391(b)(2)(E)(i). So liability was calculated as of December 31, 2022, as Yellow withdrew upon its 2023Page 13 bankruptcy. Because Central States did not receive its special financial assistance until January 2023, the No-Receivables Regulation barred the inclusion of those funds—totaling $35.8 billion—as “assets” in the calculation of withdrawal liability. 29 C.F.R. § 4262.16(g)(2)(xiii).

The ten other MEPPs had received their special financial assistance by the time they filed their proofs of claims, so the Phase-In Regulation applied rather than the NoReceivables Regulation. Yellow’s withdrawal liability, calculated accordingly, counted in the balance only some of the special financial assistance funds (those that had been “phased in”).

Separate from these regulatory questions, Yellow's withdrawal from the plans also raised a question regarding how to calculate its withdrawal liability under the statutory scheme. In relevant part, two MEPPs—the New York Teamsters Fund and the Western Pennsylvania Teamsters Fund—filed proofs of claim in line with an agreement they made with Yellow in 2013. That agreement allowed Yellow to reenter those MEPPs (it had previously withdrawn) and contribute to its employees’ benefits at 25% of its usual rate, which meant diminished accruals for those employees. But in that same contract, the plans and Yellow agreed that if Yellow later faced withdrawal liability, it would do so at 100% of the usual contribution rate. So those MEPPs filed proofs of claim for withdrawal liability at the 100% rate.

After objections and motions, the parties cross-moved for summary judgment on these issues. Before us now is the Bankruptcy Court's Amended Memorandum Opinion and Order, which held in part:

• · Page 14The Phase-In Regulation and No-Receivables Regulations were valid exercises of the PBGC’s statutory authority and were not otherwise arbitrary and capricious; and
• · Yellow can be held to its agreement to pay withdrawal liability at 100% of the contribution rate because the statutory formula for calculating withdrawal liability sets a floor on an exiting employer’s liability, not a ceiling.

In re Yellow Corp. , No. 23-11069, 2024 WL 4925124, at *718 (Bankr. D. Del. Nov. 5, 2024).

The Bankruptcy Court certified its order for direct appeal, and we granted the petition to do so. Though the novel issue of the regulations’ validity was the basis for the certification, we take the entire order on appeal, so we consider the statutory withdrawal-calculation issue as well. 28 U.S.C. § 158(d)(2).

The Bankruptcy Court had core proceeding jurisdiction. 28 U.S.C. § 157(b)(2)(B). We have jurisdiction over this direct appeal of the Bankruptcy Court's order under 28 U.S.C. § 158(d)(2)(A).²

Page 15We review a bankruptcy court’s rulings on questions of law de novo. In re FTX Trading Ltd. , 91 F.4th 148, 152 (3d Cir. 2024).

Yellow argues that the regulations violate the PBGC’s

statutory authority and are arbitrary, capricious, or otherwise

invalid. We first address those challenges to the regulations

before moving to the withdrawal-liability calculation issue.

Yellow lobs a slew of challenges at the regulations. As we explain, each fails.

Courts must “independently interpret” statutes granting authority to an agency to ensure the agency’s actions are within 'the boundaries of [its] delegated authority.' Loper Bright Enters. v. Raimondo , 603 U.S. 369, 395 (2024) (citation modified). The Loper Bright Court rejected the “fiction” that statutory ambiguity is always a grant of authority to an agency. Id. at 404. Even so, a “statute’s meaning may well be that the agency is authorized to exercise a degree of discretion.” Id. at 394. Thus, courts must 'independently identify and respect such delegations of authority, police the outer statutory boundaries of those delegations, and ensure that agencies exercise their discretion' appropriately. Id. at 404.

In this context, Yellow's strongest argument is that ARPA did not grant the PBGC the regulatory authority to change the statutory formula for withdrawal-liability calculation. In its view, the PBGC did so by excluding the special financial assistance funds from the assets considered in that calculation of 'unfunded vested benefits.' 29 U.S.C. § 1393(c).

We are not convinced. The Bankruptcy Court put it well: “Congress has expressly granted the PBGC the type of gap-filling authority that Loper Bright described, both in ERISA as originally enacted in 1974 and again in the provisions of [ARPA] that are directly at issue here.' In re Yellow Corp. , 2024 WL 4925124, at *7. In fact, ARPA explicitly grants PBGC the power to set conditions on thePage 17 “allocation of plan assets,” as it did with these regulations. 29 U.S.C. § 1432(m)(1).

Through ARPA, Congress issued the special financial assistance only for recipient plans “to make benefit payments and pay plan expenses.” 29 U.S.C. § 1432( l ). But if those funds were included as assets under withdrawal-liability calculation, that would necessarily mean that the funding would subsidize the liability of employers that withdrew from the plans. (And what savvy employer considering withdrawal would not use that opportunity to do so at a withdrawal-liability discount?) If used this way—as an unintentional withdrawal-liability subsidy-the funds would clearly not be for either 'benefit payments” or “plan expenses.” Id. Congress, instead, left it to the PBGC to fill that gap and effect the statute’s goals. The agency did so by issuing the two regulations to ensure that the funds are used for the statutorily mandated purpose of being 'allocat[ed]' in ways that would comply with ARPA. 29 U.S.C. § 1432(m)(1).

This reading also squares with the Supreme Court's guidance on how to mesh later, specific statutes with earlier, broader ones. A key function of the MPPAA was to prevent pension-plan collapse when several employers withdrew. E.g. , 29 U.S.C. § 1381 (establishing withdrawal liability for withdrawing employers). ARPA was meant to bolster struggling plans, and Congress set specific uses for the special financial assistance granted as part of that legislation. In circumstances like this, when “the scope of the earlier statute is broad but the subsequent statutes more specifically address the topic at hand,' the 'specific policy embodied in a later federal statute should control our construction of the [earlier] statute, even though it ha[s] not been expressly amended.'Page 18 FDA v. Brown & Williamson Tobacco Corp. , 529 U.S. 120, 143 (2000) (alterations in original) (quoting in the second instance United States v. Est. of Romani , 523 U.S. 517, 530– 31 (1998)).

As did the Bankruptcy Court, we understand this guidance to control our case. The statutory formula for calculating a plan’s “unfunded vested benefits”—from which withdrawal liability is derived-is broad. Original to the MPPAA, it “governs the calculation of withdrawal liability in general .” In re Yellow Corp. , 2024 WL 4925124, at *9 (emphasis in original). But ARPA 'embodied' the 'specific policy,” Brown & Williamson , 529 U.S. at 143, of granting special assistance funds only “to make benefit payments and pay plan expenses,' otherwise 'segregat[ing]' those funds “from other plan assets,” 29 U.S.C. § 1432( l ). We follow the principle of statutory construction offered in Brown & Williamson and conclude that, for calculating withdrawal liability, the more specific provisions of ARPA control over the general provisions of the MPPAA.³

Page 19In this light, the two regulations are “reasonable conditions' on the grant of funds to the plans, promulgated according to Congress's grant of authority to the PBGC in ARPA, 29 U.S.C. § 1432(m)(1).

As part of its scattershot challenge to the regulations, Yellow faults them as arbitrary or capricious. We disagree.

An agency action is “arbitrary or capricious if it is not reasonable and reasonably explained.” Ohio v. EPA , 603 U.S. 279, 292 (2024) (citation modified). We thus examine whether the agency gave 'a satisfactory explanation for its action including a rational connection between the facts found and the choice made.” Motor Vehicle Mfrs. Ass’n. of the U.S., Inc. v. State Farm Mut. Auto. Ins. Co. , 463 U.S. 29, 43 (1983) (quotation omitted). We do not review these policy-making decisions de novo, as courts are forbidden to “substitute their own judgment for that of the agency.” FDA v. Wages & White Lion Invs. , 145 S. Ct. 898, 917 (2025). We “simply ensure[] that the agency has acted within a zone of reasonableness.' FCC v. Prometheus Radio Project , 592 U.S. 414, 423 (2021).

As the Bankruptcy Court aptly explained, the noticeand-comment process for the regulations was comprehensive. “[I]ndustry stakeholders, including employers, pension plans, actuarial firms, law firms, individuals, and members of Congress' weighed in. In re Yellow Corp. , 2024 WL 4925124, Page 20at *13. There was even a “listening tour.” Id. The main thrust of the feedback was a concern 'that if special financial assistance were immediately recognized in the calculation of unfunded vested benefits[,] . . . employers would withdraw from the pension plans—leaving those who remain holding the bag.” Id. These concerns had weight, especially against the backdrop of ERISA and MPPAA's history-'avoiding a circumstance in which one employer's withdrawal from a troubled multiemployer plan would have a cascading effect that would destroy the plan.' Id. The PBGC issued these regulations to “balance the objectives” set by Congress in the MPPAA and to fulfill ARPA's purpose of strengthening “struggling pension plans.” Id.

Before us, Yellow does not challenge the breadth of the PBGC’s reasoning or the scale of its efforts, but it objects to the agency’s conclusions and their consequences.

In the main, it argues that the PBGC’s concern—that an influx of funding to the plans would subsidize an employerwithdrawal death-spiral—was misplaced. But Yellow just as quickly concedes that the regulations serve 'to discourage employers from withdrawing from financially troubled MEPPs, which might otherwise encourage additional withdrawals and create a downward spiral.” MFN & Mobile Street Opening Br. at 45 (quotation omitted). We agree with the latter.

In other places, Yellow disputes certain industry figures and estimates relied on by the PBGC, 4 but these industry Page 21figures are 'predictive judgments about the likely economic effects of a rule” that courts, including this one, are “particularly loath to second-guess.” Newspaper Ass’n of Am. v. Postal Regul. Comm'n , 734 F.3d 1208, 1216 (D.C. Cir. 2013) (quotation omitted). We are convinced that the administrative record reflects “reasonable” rulemaking, “reasonably explained.” Ohio , 603 U.S. at 292. Our “appropriate deference” is owed to “agency decisionmaking,” not to Yellow’s efforts to convince us it would have gone about the rulemaking another way. Wages & White Lion , 145 S. Ct. at 917.

To succeed, Yellow must show that the PBGC's decision-making was so outside the “zone of reasonableness,” Prometheus Radio Project , 592 U.S. at 423, that it flunks our 'deferential' review of agency policymaking, Loper Bright , 603 U.S. at 392. For the reasons noted, Yellow has not made that showing.

We briefly address Yellow’s other regulatory arguments.

(a) The regulations are not conditions on third parties. The PBGC’s regulations are conditions on the plans, in line with Congress's grant of authority. Recall that the relevant regulation says that a ' plan that receives special financial assistance must be administered in accordance with” the regulations. 29 C.F.R. § 4262.16(a) (emphasis added). The Phase-In and No-Receivables Regulations then instruct the plan how to calculate withdrawal liability in light of the special financial assistance funding. This is a job for the MEPPs themselves: the relevant statutes do “not call upon the [withdrawing] employer to propose the amount of withdrawal liability. Rather, it places the calculation burden on the plan’s trustees.' Bay Area Laundry & Dry Cleaning Pension Tr. Fund v. Ferbar Corp. of Cal. , 522 U.S. 192, 197 (1997).

The most forceful part of Yellow's argument is that these regulations are actually conditions on the employers, not the plan. It contends the regulations “directly modify participating employers’ statutory rights to have” their withdrawal liability “calculated in the way Congress prescribed.' MFN & Mobile Street Opening Br. at 22. But Yellow does not identify the source of those “rights.”

In any event, this argument gets it backward. Every clue from the regulatory and statutory text points us to the conclusion that ARPA and the PBGC’s regulations are directed at the plans , not the employers. As the PBGC said in its brief to us, Yellow’s argument “rests on” the “unfounded Page 23assumption” that Yellow has “a claim” to the special financial assistance funds. PBGC Answering Br. at 21. It does not. Before ARPA was passed, Yellow was 'obligated to pay withdrawal liability to' the MEPPs. Id. These regulations “merely preserve[] the status quo and prevent[] [ARPA] funds from being redirected to participating employers by reducing their withdrawal liability.” Id. 5

(b) The major questions doctrine does not apply. The major questions doctrine stands for the following general proposition: An agency cannot take action that results in a 'transformative expansion' of its authority-especially over issues of “vast economic and political significance”—without express permission from Congress. West Virginia v. EPA , 597 U.S. 697, 716, 724 (2022) (quotations omitted). In those 'extraordinary cases,' we might 'hesitate before concluding that Congress meant to confer such authority.' Id. at 721 (internal quotation omitted).

This is not an extraordinary case. Congress created the

PBGC to set regulations on withdrawal liability, made clear

through ARPA it did not want special financial assistance to be

used to subsidize withdrawal liability, and charged the PBGC

specifically with the task to 'impose, by regulation[,] . . .

reasonable conditions” related to “withdrawal liability” on any

'eligible multiemployer plan that receives special financial

assistance.” 29 U.S.C. § 1432(m)(1). Far from aPage 24 “transformative expansion,” this is PBGC business as usual, transacted per “clear congressional authorization.” West Virginia , 597 U.S. at 723–24 (quotations omitted).

Yellow plays the doctrine as a get-out-of-regulationfree card, but we decline to accept that move.

The regulatory issues above were the basis for our granting this direct appeal. But another withdrawal-liabilitycalculation issue came to us through the operation of the directcertification statute, by which we exercise jurisdiction over the entire Bankruptcy Court order, not just those novel issues favoring certification. 28 U.S.C. § 158(d)(2). The Bankruptcy Court ruled that the MPPAA permitted two plans, the New York Teamsters Fund and the Western Pennsylvania Teamsters Fund, to enforce their contract with Yellow and demand withdrawal liability at a contractually-bargained-for rate higher than Yellow’s actual contributions. We agree.

As background, Yellow reentered the New York Teamsters Fund and the Western Pennsylvania Teamsters Fund in 2013. The reentry agreements allowed Yellow to pay reduced contribution rates for employees, as little as 25% of what would normally be required, leading to diminished accruals for those employees. If Yellow withdrew from the pension plans, both agreements allowed the plans to calculate the withdrawal liability at the full 100% of the contribution rate. Accordingly, the Funds submitted proofs of claim in Yellow’s bankruptcy that calculated its liability at the 100%Page 25 contribution rate.⁶ The relevant statutory text suggests withdrawal liability is calculated using an employer’s actual contribution rates for a time period before the withdrawal. See 29 U.S.C. § 1391 (setting out four ways of calculating liability, each of which incorporates this contribution-rate math). Alternative calculation methods are permissible only when a plan obtains PBGC approval, see id. § 1391(c)(5)(A); 29 C.F.R. § 4211.23(b), but the New York and Western Pennsylvania funds did not.

Thus here, as in the Bankruptcy Court, Yellow challenges the 100% contribution-rate calculation as a violation of law. But the Bankruptcy Court agreed with the plans that “they did not need PBGC approval” to use the 100% contribution-rate calculation because Yellow “ agreed to treat [its] withdrawal liability claims in this manner.” In re Yellow Corp. , 2024 WL 4925124, at *17 (emphasis in original). The Court reasoned that the MPPAA establishes 'a withdrawal liability floor, rather than a withdrawal liability ceiling.' Id. That is because “the MPPAA establishes mandatory liability, overriding contracts that allowed firms to withdraw with an Page 26effective transfer of unfunded liability to the federal Treasury. It does not forbid employers from agreeing to pay extra money to a pension trust.” Id. (quoting Artistic Carton Co. v. Paper Indus. Union-Mgmt. Pension Fund , 971 F.2d 1346, 1353 (7th Cir. 1992)). And, in any event, because 'the purpose of the MPPAA is to ensure the solvency of multiemployer plans, . . . case law has interpreted the statute liberally to protect plans’ solvency.” Cent. States, Se. & Sw. Areas Pension Fund v. Laguna Dairy, S. De R.L. De C.V. , 132 F.4th 672, 678 (3d Cir. 2025).

True, at first glance the contractual provision here seems to run headlong into the statutory requirement that “any other alternative method for determining an employer's' withdrawal liability must be approved by the PBGC. 29 U.S.C. § 1391(c)(5)(A). Yellow would have us believe so. But we do not for two reasons.

First, Yellow never reckons sufficiently with the fact that this approval is required not for every accounting change, but just for those that are a “completely different method” for a plan as a whole. Peick , 724 F.2d at 1256. Here, the contract simply made clear that the plan’s normal contribution rate and calculation would apply upon Yellow's withdrawal, so we struggle to see how any such change requiring PBGC approval occurred. Second, by statute, any PBGC approval must be “based on its determination that adoption of the method by the plan would not significantly increase the risk of loss to plan participants and beneficiaries or to the corporation.” 29 U.S.C. § 1391(c)(5)(A). Although its understanding of the statute is not entitled to deference, see Loper Bright , 603 U.S. at 396, we agree with the PBGC that agreements mandating a method whereby an employer agrees to pay more withdrawal liabilityPage 27 'pose[] no such risk.' PBGC Supp. Br. at 5 (citing PBGC, Opinion Letter 89-8 (Oct. 19, 1989), 1989 WL 224526).

So, bottom line, “employers may waive limitations on their withdrawal liability . . . without approval as an alternative method.” Artistic Carton , 971 F.2d at 1354 (emphasis added) (citing PBGC Opinion Letter 89-8). This flexibility-which results only in employers making higher withdrawal-liability payments, not lower ones-makes good sense. Consider it here: Yellow’s contracted-for withdrawal contribution rate was an exchange of (a) greater solvency for the plans in the event of its withdrawal for (b) permission for Yellow to contribute at a lower rate.

Yellow offers no good reason why we should not enforce its own contract against it, instead pointing us to an array of cases in which a plan imposed, without consent, a higher contribution rate on a withdrawing employer’s liability calculation. Yellow Withdrawal Br. at 15-22 (collecting cases). That is not the case here, where Yellow contracted for this result . We know no convincing statutory case against holding Yellow to its end of the bargain. Seeking to reenter these pension plans, it bargained for a discount on its contributions by offering to pay full freight on its withdrawal liability if the time came. It is here.

* * *

The PBGC’s Phase-In and No-Receivables Regulations were valid exercises of its delegated authority under ARPA, and Yellow must pay the higher withdrawal liability contracted for with the New York and Western Pennsylvania Teamsters Funds. Therefore, we affirm.