Code of Federal Regulations Title 31. Money and Finance–Treasury § 31.205.16 What special rules apply to Federal assistance programs and projects funded by the Federal Highway Trust Fund?

(a) A State must request funds at least weekly for current project costs, or Federal interest liability will not accrue prior to the day a State submits a request for funds.

(b) If a State pays out its own funds in the absence of a project agreement or in excess of the Federal obligation in a project agreement, the Federal Program Agency will not incur an interest liability.