D.C. Mun. Regs. tit. 16, § 640
640.1 Storage charges may be charged by a consumer goods repair dealer in the following circumstances:
(a) If the customer has been notified of the following:
(1) That repairs have been completed;
(2) The date after which storage charges will begin to accrue; and
(3) The cost of the storage charges;
(b) If the customer has failed to call the dealer for oral communication of an estimate as required in § 634; or
(c) If the Department, upon review under § 622, has determined that the dealer is entitled to storage charges.