[Code of Federal Regulations] [Title 41, Volume 4] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 41CFR301-71.105] [Page 88-89] TITLE 41--PUBLIC CONTRACTS AND PROPERTY MANAGEMENT CHAPTER 301--TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES PART 301-71_AGENCY TRAVEL ACCOUNTABILITY REQUIREMENTS--Table of Contents Subpart B_Travel Authorization Sec. 301-71.105 Must we issue a written or electronic travel authorization in advance of travel? Yes, except when advance written or electronic authorization is not possible or practical and approval is in accordance with Sec. Sec. 301-2.1 and 301-2.5 for: (a) Use of first-class or business-class service on common carrier transportation; (b) Use of a foreign air carrier; (c) Use of reduced fares for group or charter arrangements; (d) Use of cash to pay for common carrier transportation; (e) Use of extra-fare train service; (f) Travel by ship; (g) Use of a rental car; (h) Use of a Government aircraft; (i) Payment of reduced rate per diem; (j) Payment of actual expenses; (k) Travel expenses related to emergency travel; (l) Transportation expenses related to threatened law enforcement/ investigative employees and members of their immediate families; (m) Travel expenses related to travel to a foreign area, except as provided by agency mission; (n) Acceptance of payment from a non-Federal source for travel expenses (see chapter 304 of this title); and (o) Travel expenses related to attendance at a conference. Note to Sec. 301-71.105: You should establish procedures for travel situations where it is not practical or possible to issue a written [[Page 89]] authorization in advance, except for paragraphs (c), (i), (n), and (o), which always require written or electronic advance authorization. [FTR Amdt. 70, 63 FR 15974, Apr. 1, 1998, FTR Amdt. 2005-03, 70 FR 28460, May 18, 2005]