Section 11.703 - Contract clauses(a) The contracting officer shall insert the clause at 52.211-16, Variation in Quantity, in solicitations and contracts, if authorizing a variation in quantity in fixed-price contracts for supplies or for services that involve the furnishing of supplies.(b) The contracting officer may insert the clause at 52.211-17, Delivery of Excess Quantities, in solicitations and contracts, when a fixed-price supply contract is contemplated.(c) The contracting officer shall insert the clause at 52.211-18, Variation in Estimated Quantity, in solicitations and contracts when a fixed-price construction contract is contemplated that authorizes a variation in the estimated quantity of unit-priced items.48 FR 42159, Sept. 19, 1983, as amended at 54 FR 34753, Aug. 21, 1989. Redesignated and amended at 60 FR 48241, Sept. 18, 1995; 64 FR 10538, Mar. 4, 1999