Under 49 U.S.C. 20106 , issuance of the regulations in this subchapter preempts any State law, regulation, or order covering the same subject matter, except an additional or more stringent law, regulation, or order that is necessary to eliminate or reduce an essentially local security hazard; that is not incompatible with a law, regulation, or order of the U.S. Government; and that does not unreasonably burden interstate commerce. For example, under 49 U.S.C. 20106 , issuance of 49 CFR 1580.205 preempts any State or tribal law, rule, regulation, order or common law requirement covering the same subject matter.
49 C.F.R. §1580.5