Any financial assistance provided to local governments under this chapter may not exceed 90 percent of the cost of carrying out the project. Commencing in the 1997 calendar year and in each calendar year thereafter, 50 percent of the amount of funds received by the state pursuant to Section 8(g) of the Outer Continental Shelf Lands Act (43 U.S.C. Sec. 1337(g)) over the amount of funds so received in the 1996 calendar year shall be available, on an annual basis, for appropriation to the secretary for grants to coastal counties and cities pursuant to this chapter.