[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR750.502] [Page 365] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 750_HIGHWAY BEAUTIFICATION--Table of Contents Subpart E_Signs Exempt From Removal in Defined Areas Sec. 750.502 Applicability. The provisions of this subpart apply to signs adjacent to the Interstate and primary systems which are required to be controlled under 23 U.S.C. 131.