Official Travel Travelers should familiarize themselves with the appropriate travel regulations so that reimbursement for authorized travel expenses on official business may be properly claimed. Travelers are expected to exercise good judgment and economy when incurring reimbursable travel expenses in the performance of official travel. Travelers are responsible for the correct performance of official travel and for the payment of any charges incurred through failure to comply with the governing regulations, regardless of who may have assisted the traveler in making the travel arrangements. All official travel must be by the most direct and usually traveled route. Travel by an indirect route is performed at the employee's expense.
Reimbursement is claimed on a comparative cost basis.
Leave is charged for any excess travel time. In accordance with the Fly America Act, all government financed air travel is to be performed on United States carriers, where such service is available. In certain cases, an employee's dependents may be authorized delayed travel to post or advance travel from post to the United States. Internal Revenue Manual Hndbk.