Section 420.107, paragraph (a) of the Code of Federal Regulations states that:
A State DOT must expend no less than 25 percent of its annual SPR funds on RD&T activities relating to highway, public transportation, and intermodal transportation systems in accordance with the provisions of 23 U.S.C. 505(b). . .
37 Miss. Code. R. § 1-8601-02007-102