As we previously reported, the American Rescue Plan Act of 2021 (ARPA) was signed into law on March 11, 2021, requiring, among other things, the Pension Benefit Guaranty Corporation (PBGC) to issue its implementing regulations by July 9, 2021. As promised, PBGC issued an interim final rule, 86 Fed. Reg. 36598 (July 12,