[Code of Federal Regulations] [Title 49, Volume 5] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR397.203] [Page 482-483] TITLE 49--TRANSPORTATION CHAPTER III--FEDERAL MOTOR CARRIER SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 397_TRANSPORTATION OF HAZARDOUS MATERIALS; DRIVING AND PARKING RULES--Table of Contents Subpart E_Preemption Procedures Sec. 397.203 Standards for determining preemption. (a) Any highway routing designation established, maintained, or enforced by a State, political subdivision thereof, or Indian tribe is preempted if-- [[Page 483]] (1) Compliance with both the highway routing designation and any requirement under the Act or of a regulation issued under the Act is not possible; (2) The highway routing designation as applied or enforced creates an obstacle to the accomplishment and execution of the Act or the regulations issued under the Act; or (3) The highway routing designation is preempted pursuant to Sec. 397.69(b) of this part. (b) [Reserved] [57 FR 44132, Sept. 24, 1992, as amended at 59 FR 51834, Oct. 12, 1994]