; or (B) the project is subject to a master credit agreement (as defined in section 601(a)), in accordance with section 602(b)(2). (2) Appalachian State The term Appalachian State means a State that contains 1 or more counties in the Appalachian region (as defined in section 14102(a) of title 40). (3) Program The term program means the Balance Exchanges for Infrastructure Program established under subsection (b). (4) TIFIA carryover balance (A) In general The term TIFIA carryover balance means the amounts made available for the TIFIA program for previous fiscal years that are unobligated and have not been administratively allocated. (B) Inclusion The term TIFIA carryover balance includes— (i) the applicable amount of contract authority for the amounts described in subparagraph (A); and (ii) the equivalent amount of obligation limitation for the fiscal year in which the Secretary makes a transfer under subsection (f)(2). (5) TIFIA program The term TIFIA program has the meaning given the term in section 601(a). (b) Establishment The Secretary shall establish a program, to be known as the Balance Exchanges for Infrastructure Program , in accordance with this section to provide flexibility for the Secretary and States to improve highway infrastructure. (c) Offer To fund projects or exchange funds (1) Solicitation For each fiscal year for which an amount is reserved under subsection (f)(1), the Secretary shall— (A) not later than December 1 of that fiscal year— (i) solicit requests from Appalachian States to return amounts under subsection (d)(1)(A); and (ii) solicit applications from Appalachian States for grants under subsection (e); and (B) require that, not later than 60 days after the date of the solicitations under subparagraph (A), each Appalachian State that elects to participate in the program shall submit to the Secretary either— (i) a request that describes the amount that the Appalachian State requests to return under subsection (d)(1)(A)