[Code of Federal Regulations] [Title 48, Volume 6] [Revised as of October 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 48CFR1516.603] [Page 35] TITLE 48--FEDERAL ACQUISITION REGULATIONS SYSTEM CHAPTER 15--ENVIRONMENTAL PROTECTION AGENCY PART 1516--TYPES OF CONTRACTS--Table of Contents Subpart 1516.6--Time-and-Materials, Labor-Hour, and Letter Contracts Sec. 1516.603 Letter Contracts.