applicability of certain provisions Contracts described in paragraph (1) shall be subject to the following delayed applicability requirements: (A) Section 5320(m)(2) shall apply to contracts entered into on or after the date that is 30 days after the date of enactment of this Act. (B) Notwithstanding subparagraph (A), section 5320(m) shall apply to contracts for the procurement of bus rolling stock beginning on the earlier of— (i) 180 days after the date on which final regulations are issued pursuant to subsection (b)