49 CFR 674.5: Policy.

(a) In accordance with 49 U.S.C. 5329, a State that has a rail fixed guideway public transportation system within the State has primary responsibility for overseeing the safety of that rail fixed guideway public transportation system. A State safety oversight agency must have the authority, resources, and qualified personnel to oversee the number, size, and complexity of rail fixed guideway public transportation systems that operate within a State.

(b) FTA will certify whether a State safety oversight program meets the requirements of 49 U.S.C. 5329 and is adequate to promote the purposes of the public transportation safety programs codified at 49 U.S.C. 5329.