Selling costs shall be allowable to the extent that they are reasonable and are allocable to the District contract.
The contracting officer shall determine allocability of selling costs in the light of reasonable benefit to the District arising from activities, such as technical, consulting, demonstration, and other services, that are the application or adaptation of the contractor's products to District use for its own requirements or similar purposes.
Sellers' or agents' compensation, fees, commissions, percentages, or brokerage fees shall be allowable only when paid to bona fide employees or established commercial or selling agencies maintained by the contractor for the purpose of securing business.
D.C. Mun. Regs. tit. 27, r. 27-3327