[Code of Federal Regulations] [Title 48, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 48CFR416.603-2] [Page 117] TITLE 48--FEDERAL ACQUISITION REGULATIONS SYSTEM CHAPTER 4--DEPARTMENT OF AGRICULTURE PART 416_TYPES OF CONTRACTS--Table of Contents Subpart 416.6_Time-and-Materials, Labor-Hour, and Letter Contracts Sec. 416.603-2 Application. The HCA is authorized to extend the period for defining a letter contract required by FAR 16.603-2(c) in extreme cases where it is determined in writing that such action is in the best interest of the Government.