[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-2.1] [Page 19] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-2--GENERAL RULES--Table of Contents Sec. 301-2.1 Must I have authorization to travel? Yes, generally you must have written or electronic authorization prior to incurring any travel expense. If it is not practicable or possible to obtain such authorization prior to travel, your agency may approve a specific authorization for reimbursement of travel expenses after travel is completed. However, written or electronic advance authorization is required for items in Sec. 301-2.5 (c), (i), (n), and (o) of this part.