Each State shall allocate 15 percent of the funds apportioned to it for each fiscal year under
section 777c of this title for the payment of up to 75 per centum of the costs of the acquisition, development, renovation, or improvement of facilities (and auxiliary facilities necessary to insure the safe use of such facilities) that create, or add to, public access to the waters of the United States to improve the suitability of such waters for recreational boating purposes. Notwithstanding this provision, States within a United States Fish and Wildlife Service Administrative Region may allocate more or less than 15 percent in a fiscal year, provided that the total regional allocation averages 15 percent over a 5 year period.