[Code of Federal Regulations] [Title 43, Volume 2] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 43CFR3141.5-5] [Page 416] TITLE 43--PUBLIC LANDS: INTERIOR CHAPTER II--BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR PART 3140_LEASING IN SPECIAL TAR SAND AREAS--Table of Contents Subpart 3141_Leasing in Special Tar Sand Areas Sec. 3141.5-5 Dating of lease. A combined hydrocarbon lease shall be effective as of the first day of the month following the date the lease is signed on behalf of the United States, except that where prior written request is made, a lease may be made effective on the first of the month in which the lease is signed.