; and (ii) may include a commitment, contingent on amounts to be specified in law in advance for commitments under this paragraph, to obligate an additional amount from future available budget authority specified in law. (B) Contingent commitment A contingent commitment under this subsection is not an obligation of the Federal Government under section 1501 of title 31. (C) Interest and other financing costs (i) In general Interest and other financing costs of carrying out a part of the project within a reasonable time shall be considered a cost of carrying out the project under a multiyear grant agreement, except that eligible costs may not be more than the cost of the most favorable financing terms reasonably available for the project at the time of borrowing. (ii) Certification The applicant shall certify to the Secretary that the applicant has shown reasonable diligence in seeking the most favorable financing terms. (4) Advance payment An eligible entity carrying out a large project under a multiyear grant agreement— (A) may use funds made available to the eligible entity under this title or title 49 for eligible project costs of the large project; and (B) shall be reimbursed, at the option of the eligible entity, for such expenditures from the amount made available under the multiyear grant agreement for the project in that fiscal year or a subsequent fiscal year. (e) Eligible projects (1) In general The Secretary may make a grant under this section only for a project that is a project eligible for assistance under this title or chapter 53 of title 49 and is— (A) a bridge project carried out on the National Highway System; (B) a project to improve person throughput that is— (i) a highway project carried out on the National Highway System; (ii) a public transportation project; or (iii) a capital project, as such term is defined in section 22906 of title 49, to improve intercity rail passenger transportation