As prescribed in 43.205(a),
(1) The contracting officer shall insert the clause at 52.243-1, Changes—Fixed-Price, in solicitations and contracts when a fixed-price contract for supplies is contemplated.
(2) If the requirement is for services, other than architect-engineer or other professional services, and no supplies are to be furnished, the contracting officer shall use the clause with its Alternate I.
(3) If the requirement is for services (other than architect-engineer services, transportation, or research and development) and supplies are to be furnished, the contracting officer shall use the clause with its Alternate II.
(4) If the requirement is for architect-engineer or other professional services, the contracting officer shall use the clause with its Alternate III.
(5) If the requirement is for transportation services, the contracting officer shall use the clause with its Alternate IV.
(6) If it is desired to include the clause in solicitations and contracts when a research and development contract is contemplated, the contracting officer shall use the clause with its Alternate V.
Changes—Fixed Price Alternate III (Apr 1984).
(a) The Contracting Officer may at any time, by written order, and without notice to the sureties, if any, make changes within the general scope of this contract in the services to be performed.
(b) If any such change causes an increase or decrease in the cost of, or the time required for, performance of any part of the work under this contract, whether or not changed by the order, the Contracting Officer shall make an equitable adjustment in the contract price, the delivery schedule, or both, and shall modify the contract.
(c) The Contractor must assert its right to an adjustment under this clause within 30 days from the date of receipt of the written order. However, if the Contracting Officer decides that the facts justify it, the Contracting Officer may receive and act upon a proposal submitted before final payment of the contract.
(d) If the Contractor’s proposal includes the cost of property made obsolete or excess by the change, the Contracting Officer shall have the right to prescribe the manner of the disposition of the property.
(e) Failure to agree to any adjustment shall be a dispute under the Disputes clause. However, nothing in this clause shall excuse the Contractor from proceeding with the contract as changed.
(f) No services for which an additional cost or fee will be charged by the Contractor shall be furnished without the prior written authorization of the Contracting Officer.
(End of clause)