[Code of Federal Regulations] [Title 43, Volume 1] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 43CFR3.7] [Page 40] TITLE 43--PUBLIC LANDS: INTERIOR PART 3--PRESERVATION OF AMERICAN ANTIQUITIES--Table of Contents Sec. 3.7 Permit to become void. Failure to begin work under a permit within 6 months after it is granted, or failure to diligently prosecute such work after it has been begun, shall make the permit void without any order or proceeding by the Secretary having jurisdiction.