FAR 8.4 provides specific authorities for GSA schedule contracts that supercede the FAR 16.5’s specific provisions for task order or indefinite delivery contract types
Subpart 16.5 -- Indefinite-Delivery Contracts
16.501-1 -- Definitions.
As used in this subpart --
“Delivery-order contract” means a contract for supplies that does not procure or specify a firm quantity of supplies (other than a minimum or maximum quantity) and that provides for the issuance of orders for the delivery of supplies during the period of the contract.
“Task-order contract” means a contract for services that does not procure or specify a firm quantity of services (other than a minimum or maximum quantity) and that provides for the issuance of orders for the performance of tasks during the period of the contract.
16.503 -- Requirements Contracts.
(a) Description. A requirements contract provides for filling all actual purchase requirements of designated Government activities for supplies or services during a specified contract period (from one contractor), with deliveries or performance to be scheduled by placing orders with the contractor.
(1) For the information of offerors and contractors, the contracting officer shall state a realistic estimated total quantity in the solicitation and resulting contract. This estimate is not a representation to an offeror or contractor that the estimated quantity will be required or ordered, or that conditions affecting requirements will be stable or normal. The contracting officer may obtain the estimate from records of previous requirements and consumption, or by other means, and should base the estimate on the most current information available.
(2) The contract shall state, if feasible, the maximum limit of the contractor’s obligation to deliver and the Government’s obligation to order. The contract may also specify maximum or minimum quantities that the Government may order under each individual order and the maximum that it may order during a specified period of time.
(1) A requirements contract may be appropriate for acquiring any supplies or services when the Government anticipates recurring requirements but cannot predetermine the precise quantities of supplies or services that designated Government activities will need during a definite period.
(2) No requirements contract in an amount estimated to exceed $103 million (including all options) may be awarded to a single source unless a determination is executed in accordance with 16.504(c)(1)(ii)(D).
(c) Government property furnished for repair. When a requirements contract is used to acquire work (e.g., repair, modification, or overhaul) on existing items of Government property, the contracting officer shall specify in the Schedule that failure of the Government to furnish such items in the amounts or quantities described in the Schedule as “estimated” or “maximum” will not entitle the contractor to any equitable adjustment in price under the Government Property clause of the contract.
(d) Limitations on use of requirements contracts for advisory and assistance services. (1) Except as provided in paragraph (d)(2) of this section, no solicitation for a requirements contract for advisory and assistance services in excess of three years and $12.5 million (including all options) may be issued unless the contracting officer or other official designated by the head of the agency determines in writing that the services required are so unique or highly specialized that it is not practicable to make multiple awards using the procedures in 16.504. (2) The limitation in paragraph (d)(1) of this section is not applicable to an acquisition of supplies or services that includes the acquisition of advisory and assistance services, if the contracting officer or other official designated by the head of the agency determines that the advisory and assistance services are necessarily incident to, and not a significant component of, the contract.
16.504 -- Indefinite-Quantity Contracts.
(a) Description. An indefinite-quantity contract provides for an indefinite quantity, within stated limits, of supplies or services during a fixed period. The Government places orders for individual requirements. Quantity limits may be stated as number of units or as dollar values.
(b) Application. Contracting officers may use an indefinite-quantity contract when the Government cannot predetermine, above a specified minimum, the precise quantities of supplies or services that the Government will require during the contract period, and it is inadvisable for the Government to commit itself for more than a minimum quantity. The contracting officer should use an indefinite-quantity contract only when a recurring need is anticipated.
(c) Multiple award preference—
(1) Planning the acquisition.
(2) Contracts for advisory and assistance services.