D.C. Code § 2-106: Operation prohibited.

No person shall operate or cause to be operated any boiler or unfired pressure vessel, referred to in § 2-105, at a pressure greater than that permitted by the certificate of inspection, or while feed pumps, gauges, cocks, valves, or automatic safety-control devices are not in proper working condition, or in violation of any of the regulations promulgated hereunder by the Council of the District of Columbia.