For each of fiscal years 1997, 1998, 1999, 2000, 2001, 2002, and 2003, the Secretary shall pay to each Indian tribe that has an approved tribal family assistance plan a tribal family assistance grant for the fiscal year in an amount equal to the amount determined under subparagraph (B), which shall be reduced for a fiscal year, on a pro rata basis for each quarter, in the case of a tribal family assistance plan approved during a fiscal year for which the plan is to be in effect, and shall reduce the grant payable under section
603
(a)(1) of this title to any State in which lies the service area or areas of the Indian tribe by that portion of the amount so determined that is attributable to expenditures by the State.