[Code of Federal Regulations] [Title 23, Volume 1] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 23CFR661.33] [Page 342] TITLE 23--HIGHWAYS CHAPTER I--FEDERAL HIGHWAY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PART 661--INDIAN RESERVATION ROAD BRIDGE PROGRAM--Table of Contents Sec. 661.33 Do IRRBP projects have to be on a transportation improvement program (TIP)? Yes. All IRRBP projects have to be listed on an approved TIP. Under 23 U.S.C. 204(j), IRR bridges must appear on the BIA's IRRBP TIP and be forwarded to the State.