The CCO shall use firm-fixed-price contracts to procure construction.
A contract may be priced on a lump-sum basis (when a lump sum is paid for the total work or defined parts of the work), on a unit-price basis (when a unit price is paid for a specified quantity of work units), or a combination of both methods.
The CCO shall use lump-sum pricing in preference to unit pricing except when any one (1) of the following circumstances exist:
The CCO may not use fixed-price contracts with economic price adjustments when an economic price adjustment provision would preclude a significant number of firms from submitting bids or would result in bidders including unwarranted contingencies in proposed prices.
D.C. Mun. Regs. tit. 19, r. 19-4338