D.C. Mun. Regs. tit. 16, r. 16-638
The consumer goods repair dealer shall make available to the customer the repaired goods, together with the final bill, on or before the promised date specified on the written estimate (or specified orally and noted on the written estimate) unless the customer is notified of a delay, and the new anticipated completion date is provided, in advance of the original date on which the goods were promised.
If a repair is delayed beyond the promised completion date, the customer shall have the right upon request to prompt return of the goods.
In requesting a return under § 638.2, the customer shall specify whether the goods should be reassembled in such a manner as not to be inferior to their condition at the time they were presented for repair, or in such a lesser condition of assembly as the customer shall designate as acceptable.
Regardless of the state of assembly of the goods chosen by the customer under § 638.3, if the delay is caused solely by circumstances beyond the control of the consumer goods repair dealer, the repair dealer shall be entitled to charge the customer for the value of the services and parts supplied.
An exact accounting of all services and parts shall be given to the customer.
D.C. Mun. Regs. tit. 16, r. 16-638