D.C. Mun. Regs. tit. 16, r. 16-902
A licensee who conducts transactions other than pawnbroker transactions at the same place of business shall provide clearly recognizable separation between that portion of the place of business in which only pawnbroker transactions are conducted and the remaining portions of the place of business in which the licensee conducts transactions other than pawnbroker transactions, for which he or she is licensed or otherwise authorized to operate.
The provision for separation required under this section shall in each case be approved by the Director.
The licensee shall keep articles received as pledges clearly labeled and distinguished from any other article or merchandise of whatever nature which is stored or displayed in the place of business.
No licensee shall modify the physical appearance, obliterate any identification marks or number, or alter any pledge in any manner.
D.C. Mun. Regs. tit. 16, r. 16-902