D.C. Mun. Regs. tit. 19, r. 19-4323
The CCO shall utilize the types of contract described in this section that is most appropriate to each procurement.
When the competitive sealed bidding method of procurement is utilized, the CCO shall utilize either a firm-fixed-price or a fixed-price with economic price adjustment type contract.
The CCO shall determine the type of contract to be used prior to solicitation. Solicitations shall inform bidders of the type of contract that will be used.
The CCO may use any type of contract allowed by these regulations, or a combination of types, except when the procurement is by competitive sealed bids. For sealed bids, only firm-fixed-price or fixed-price with economic price adjustment contracts shall be used.
The CCO shall use a firm-fixed-price contract when the requirement is clearly defined and can be priced on a firm-fixed-price basis and when the risk involved is minimal to the Library.
The CCO shall give preference to selecting contract types in the following order:
D.C. Mun. Regs. tit. 19, r. 19-4323