[Code of Federal Regulations] [Title 5, Volume 3] [Revised as of January 1, 2007] From the U.S. Government Printing Office via GPO Access [CITE: 5CFR1690.11] [Page 296] TITLE 5--ADMINISTRATIVE PERSONNEL CHAPTER VI--FEDERAL RETIREMENT THRIFT INVESTMENT BOARD PART 1690_THRIFT SAVINGS PLAN--Table of Contents Subpart B_Miscellaneous Sec. 1690.11 Plan year. The Thrift Savings Plan's plan year is established on a calendar- year basis for all purposes, except where another applicable provision of law requires that a fiscal year or other basis be used. As used in this section, the term ``calendar-year basis'' means a twelve-month period beginning on January 1 and ending on December 31 of the same year.