CFR > Title 41 - Public Contracts and Property Management > SUBTITLE F—Federal Travel Regulation System > CHAPTER 301—TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES (parts 301-1 to 301-76) > SUBCHAPTER D—AGENCY RESPONSIBILITIES (parts 301-70 to 301-76) > PART 301-70—INTERNAL POLICY AND PROCEDURE REQUIREMENTS > SUBPART I—Policies and Procedures for Agencies That Authorize Travel on Government Aircraft (§301-70.800 to §301-70.808) > 301-70.806—What documentation must we retain for travel on Government aircraft?

301-70.806—What documentation must we retain for travel on Government aircraft?

You must retain all travel authorizations and cost-comparisons for travel on Government aircraft for two years.