to meet the additional requirements imposed by the amendments made by this Act, the plan shall not be regarded as failing to meet any of the additional requirements before the 1st day of the 1st calendar quarter beginning after 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, if the State has a 2-year legislative session, each year of the session is deemed to be a separate regular session of the State legislature.