expended: Provided , That of the sums provided under this heading in this Act— (1) $20,000,000 shall be available for ferry boat grants as authorized under section 5307(h) of such title: Provided , That of the amounts provided under this paragraph, no less than $5,000,000 shall be available for low or zero emission ferries or ferries using electric battery or fuel cell components and the infrastructure to support such ferries