; (7) $10,000,000 shall be for the regional infrastructure accelerator demonstration program authorized under section 1441 of the FAST Act ( 23 U.S.C. 601 note): Provided , That for funds made available under this paragraph, the Federal share of the costs shall be, at the option of the recipient, up to 100 percent: Provided further , That funds made available under this paragraph may be transferred to the Office of the Secretary; (8) $7,500,000 shall be for the national scenic byways program under section 162 of title 23, United States Code: Provided , That, except as otherwise provided under this heading, the funds made available under this paragraph shall be administered as if apportioned under chapter 1 of title 23, United States Code; and (9) $50,000,000, in addition to amounts made available in section 126 of this Act, shall be for a competitive highway bridge program for States that— (A) have a population density of less than 115 individuals per square mile; and (B) have— (i) less than 26 percent of total bridges classified as in good condition