[Code of Federal Regulations] [Title 40, Volume 1] [Revised as of July 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR49.10199] [Page 820] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY PART 49_TRIBAL CLEAN AIR ACT AUTHORITY--Table of Contents Subpart M_Implementation Plans for Tribes_Region X Sec. 49.10199 Permits to operate. Permits to operate are required for sources not subject to 40 CFR Part 71 in accordance with the requirements of Sec. 49.139.