D.C. Mun. Regs. tit. 27, r. 27-3904
For purposes of this chapter, the value of a contract is the combined sum of the contract value (not-to-exceed amount, or the total rent or purchase price for contracts for land or buildings, including the base period and any subsequent option periods or extensions).
For purposes of this chapter, the value of a term contract (including requirements contracts, indefinite delivery/indefinite quantity, and D.C. Supply Schedules) is the combined sum of the contract ceiling, including the base period and any subsequent option periods or extensions.
The value of contracts held with overlapping contract periods shall be aggregated for the purpose of determining the aggregate value of multiple contracts in accordance with §§ 3904.1 and 3904.2 of this chapter.
D.C. Mun. Regs. tit. 27, r. 27-3904