D.C. Mun. Regs. tit. 27, § 2106
2106.1 The Chief Procurement Officer may charge and collect, on a quarterly basis, a sales discount in the amount of one percent (1%), on all sales, purchase orders, delivery orders, task orders, and purchase card transactions invoiced under contracts awarded under the District of Columbia's multiple award schedule procurement program, also known as the District of Columbia Supply Schedule.
SOURCE: Final Rulemaking published at 55 DCR 000491 (January 18, 2008).