D.C. Mun. Regs. tit. 17, r. 17-314
Permits for work to be done in accordance with the various codes governing the scope of work permitted under this chapter, as set forth in § 301, shall be issued by the Director only to persons who hold valid Master Refrigeration and Air Conditioning Mechanic licenses or Master Refrigeration and Air Conditioning Mechanic Limited licenses, or to a firm or corporation doing business by virtue of having a person holding one of the master's licenses currently in its employ, in accordance with the provisions of this chapter.
The Director, if he or she should find that certain work does not comply with the codes and regulations governing its performance, shall inform the permit holder of the discrepancy and give the permit holder a specific amount of time to bring the work into compliance.
If the permit holder does not bring the work into compliance within the time given, the Director shall call upon the permit holder's surety bond to pay another qualified person or firm to complete the work. This action may be taken in addition to other penalties provided in this chapter and other regulations.
D.C. Mun. Regs. tit. 17, r. 17-314