The minimum acceptable purchase description shall be the identification of a requirement by use of a brand name followed by the words "or equal." This purchase description shall be used only when adequate specifications or a more detailed purchase description cannot be made available.
When using a brand name description or equal purchase description, the using agency shall also provide a list of salient characteristics, or the minimum acceptable features.
D.C. Mun. Regs. tit. 27, r. 27-2502