D.C. Mun. Regs. tit. 29, r. 29-602
Travel shall be limited where possible to the use of a public common carrier and shall be planned by the most economical usually traveled route except where official necessity for travel by another route can be justified.
An attendant shall be accountable for any re-routing contrary to government travel regulation or the interests of the District.
The hire of a special conveyance shall be allowed only where a public carrier is not available or cannot be used advantageously in the interests of the District. A satisfactory written explanation of the need for special conveyance shall be required of the attendant at the conclusion of the trip.
Only persons authorized by the District shall be eligible to receive reimbursement for use of a privately-owned automobile for transporting clients. These persons shall then be eligible only if the automobile used is sufficiently covered by bodily-injury and property damage liability insurance, currently in force. Each insurance policy, as well as each renewal, shall be submitted to the Medical Assistance Division for examination and recording.
Through tickets, excursion tickets, or reduced round-trip tickets shall be secured whenever practicable and economical.
In event of an emergency en-route, such as a missed connection or a change in service, the attendant shall consult the nearest passenger representative, ticket agent, Travelers Aid worker, or other qualified individual for assistance with revised trip plan. The attendant shall keep the type of accommodation as nearly as possible in conformity with accommodations originally provided.
An attendant who is required to leave a train, bus, airplane, or other conveyance short of the ticketed destination, or whose trip is interrupted after having surrendered a ticket (or coupon of ticket), shall obtain a statement of facts from the train conductor or person in charge of the conveyance. The statement, with a description of the accommodations furnished upon resumption of travel, shall be submitted to the Division upon conclusion of the trip.
The unused portion of tickets shall be returned to the Department for redemption. An attendant shall not attempt to secure a refund directly from a transportation company for any unused portion of a ticket obtained on a government travel request.
D.C. Mun. Regs. tit. 29, r. 29-602