(a) General.—The following amounts may be appropriated to the Secretary of Transportation:

(1) not more than $15,000,000 to carry out section 5562(a)(1) and (3) of this title.

(2) not more than $2,500,000 to carry out section 5562(a)(2) of this title.

(3) not more than $2,500,000 to carry out section 5562(a)(4) of this title.

(b) Availability of Amounts.—Amounts appropriated to carry out this chapter remain available until expended.