Versions of 12 CFR Part 253 - Regulations Implementing the Adjustable Interest Rate (Libor) Act (Regulation Zz) on LawServer 2024 12 CFR Part 253 – Regulations Implementing the Adjustable Interest Rate (Libor) Act (Regulation Zz) 2023 12 CFR PART 253 – REGULATIONS IMPLEMENTING THE ADJUSTABLE INTEREST RATE (LIBOR) ACT (REGULATION ZZ)