[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: 43CFR3135.1-4] [Page 392] TITLE 43--PUBLIC LANDS: INTERIOR CHAPTER II--BUREAU OF LAND MANAGEMENT, DEPARTMENT OF THE INTERIOR PART 3130_OIL AND GAS LEASING: NATIONAL PETROLEUM RESERVE, ALASKA --Table of Contents Subpart 3135_Transfers, Extensions, Consolidations, and Suspensions Sec. 3135.1-4 Effect of transfer of a tract. (a) When a transfer is made of all the record title to a portion of the acreage in a lease, the transferred and retained portions are divided into separate and distinct leases. Transfers shall not be made for less than a compact tract of not less than 640 acres nor shall less than a compact tract of not less than 640 acres be retained. (b) Each segregated lease shall continue in full force and effect for the primary term of the original lease and so long thereafter as oil or gas is produced in paying quantities from that segregated portion of the lease area or so long as drilling or well reworking operations, either actual or constructive, as approved by the Secretary, are conducted thereon. [46 FR 55497, Nov. 9, 1981, as amended at 53 FR 17359, May 16, 1988]