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 B—ALLOWABLE TRAVEL EXPENSES (parts 301-10 to 301-31) > PART 301-11—PER DIEM EXPENSES > SUBPART D—Actual Expense (§301-11.300 to §301-11.306) > 301-11.302—When should I request authorization for reimbursement under actual expense?

301-11.302—When should I request authorization for reimbursement under actual expense?

Request for authorization for reimbursement under actual expense should be made in advance of travel. However, subject to your agency's policy, after the fact approvals may be granted when supported by an explanation acceptable to your agency.