[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] [Page 870] 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. 49.11012 Approval status. There are currently no EPA-approved Tribal rules or measures in the implementation plan for the Umatilla Reservation.