; and . 4. Effective date (a) In general The amendments made by this Act shall take effect on the date of enactment of this Act and shall apply to payments under subpart 1 of part B of title IV of the Social Security Act for calendar quarters beginning on or after such date, and without regard to whether regulations to implement the amendments are promulgated by such date. (b) Exception for state plans requiring state law amendments In the case of a State plan under subpart 1 of part B of title IV of the Social Security Act which the Secretary determines requires State legislation in order for the plan to meet the additional requirements imposed by the amendments made by this Act, the effective date of the amendments imposing the additional requirements shall be 3 months after the first day of the first calendar quarter beginning after the close of the first regular session of the State legislature that begins after the date of the enactment of this Act. For purposes of the preceding sentence, in the case of a State that has a 2-year legislative session, each year of the session shall be considered to be a separate regular session of the State legislature.