49 CFR 355.5 - Definitions.
Unless specifically defined in this section, terms used in this part are subject to the definitions in 49 CFR 390.5.
Compatible or Compatibility means that State laws and regulations applicable to interstate commerce and to intrastate movement of hazardous materials are identical to the FMCSRs and the HMRs or have the same effect as the FMCSRs; and that State laws applicable to intrastate commerce are either identical to, or have the same effect as, the FMCSRs or fall within the established limited variances under §§ 350.341, 350.343, and 350.345 of this subchapter.
Federal Hazardous Materials Regulations (FMHRs) means those safety regulations which are contained in parts 107, 171-173, 177, 178 and 180, except part 107 and §§ 171.15 and 171.16.
Federal Motor Carrier Safety Regulations (FMCSRs) means those safety regulations which are contained in parts 390, 391, 392, 393, 395, 396, and 397 of this subchapter.