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The Revolutionary FAR Overhaul has published a revised version of this clause. The RFO version supersedes the eCFR text below for contracts using the RFO model; see the RFO deviation for applicability.
52.243-2 Changes—Cost-Reimbursement.
As prescribed in 43.205(b)(1), insert the following clause. The 30-day period may be varied according to agency procedures.
Changes—Cost-Reimbursement (AUG 1987)
(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 any one or more of the following:
(1) Drawings, designs, or specifications when the supplies to be furnished are to be specially manufactured for the Government in accordance with the drawings, designs, or specifications.
(2) Method of shipment or packing.
(3) Place of delivery.
(b) If any such change causes an increase or decrease in the estimated cost of, or the time required for, performance of any part of the work under this contract, whether or not changed by the order, or otherwise affects any other terms and conditions of this contract, the Contracting Officer shall make an equitable adjustment in the (1) estimated cost, delivery or completion schedule, or both; (2) amount of any fixed fee; and (3) other affected terms and shall modify the contract accordingly.
(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) 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.
(e) Notwithstanding the terms and conditions of paragraphs (a) and (b) above, the estimated cost of this contract and, if this contract is incrementally funded, the funds allotted for the performance of this contract, shall not be increased or considered to be increased except by specific written modification of the contract indicating the new contract estimated cost and, if this contract is incrementally funded, the new amount allotted to the contract. Until this modification is made, the Contractor shall not be obligated to continue performance or incur costs beyond the point established in the Limitation of Cost or Limitation of Funds clause of this contract.
(End of clause)
Alternate I
(APR 1984). If the requirement is for services and no supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
(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 any one or more of the following:
(1) Description of services to be performed.
(2) Time of performance (i.e., hours of the day, days of the week, etc.).
(3) Place of performance of the services.
Alternate II
(APR 1984). If the requirement is for services and supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
(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 any one or more of the following:
(1) Description of services to be performed.
(2) Time of performance (i.e., hours of the day, days of the week, etc.).
(3) Place of performance of the services.
(4) Drawings, designs, or specifications when the supplies to be furnished are to be specially manufactured for the Government in accordance with the drawings, designs, or specifications.
(5) Method of shipment or packing of supplies.
(6) Place of delivery.
Alternate III
(APR 1984). If the requirement is for construction, substitute the following paragraph (a) for paragraph (a) of the basic clause:
(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 plans and specifications or instructions incorporated in the contract.
Alternate IV
[Reserved]
Alternate V
(APR 1984). If the requirement is for research and development, and it is desired to include the clause, substitute the following subparagraphs (a)(1) and (a)(3) for subparagraphs (a)(1) and (a)(3) of the basic clause:
(a)(1) Drawings, designs, or specifications.
(3) Place of inspection, delivery, or acceptance.
[48 FR 42478, Sept. 19, 1983, as amended at 52 FR 30079, Aug. 12, 1987; 72 FR 27389, May 15, 2007]
43.205(b)
(b) (1) The contracting officer shall insert the clause at 52.243-2, Changes-Cost-Reimbursement, in solicitations and contracts when a cost-reimbursement contract for supplies is contemplated.
(2) If the requirement is for services and no supplies are to be furnished, the contracting officer shall use the clause with its AlternateI.
(3) If the requirement is for services and supplies are to be furnished, the contracting officer shall use the clause with its AlternateII.
(4) If the requirement is for construction, the contracting officer shall use the clause with its AlternateIII.
(5) [Reserved]
(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.
Prescription data sourced from eCFR as of 2026-06-10 03:16 UTC.
Cross-references within the prescription are not resolved automatically.
Regulatory Stack
The layers of regulation that govern this clause, from the FAR prescription through agency-specific supplements and any active deviations.
RFORFO VersionOverhauled clause text
The Revolutionary FAR Overhaul publishes a revised version of this clause. See the RFO Version tab for the controlling authority under the RFO model.
(b) (1) The contracting officer shall insert the clause at 52.243-2, Changes-Cost-Reimbursement, in solicitations and contracts when a cost-reimbursement contract for supplies is contemplated.
(2) If the requirement is for services and no supplies are to be furnished, the contracting officer shall use the clause with its AlternateI.
(3) If the requirement is for services and supplies are to be furnished, the contracting officer shall use the clause with its AlternateII.
(4) If the requirement is for construction, the contracting officer shall use the clause with its AlternateIII.
(5) [Reserved]
(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.
Version history is sourced from the codified eCFR. Changes published only as class deviations or by the Revolutionary FAR Overhaul do not appear here until they are incorporated into the eCFR. For RFO-driven changes see the RFO Version tab and any active deviations cited above.
No version history available from eCFR.
RFO Version
Comparison of the codified eCFR text against the Revolutionary FAR Overhaul revision. Highlights show additions (green) and deletions (red, struck through).
Clause Text
Substantive changes. The RFO version differs materially from the eCFR text.
eCFR (codified)
RFO (implemented)
Unchanged
52.243-2 Changes-Cost-Reimbursement.
eCFR (codified)
RFO (implemented)
1 added, 1 removed
As prescribed in 43.205(b)(1), insert the following clause. The 30-day period may be varied according to agency procedures.
As prescribed in 43.305(b)(1), insert the following clause. The 30-day period may be varied according to agency procedures.
3 added, 3 removed
Changes—Cost-Reimbursement (AUG 1987)
Changes-Cost-Reimbursement (Deviation Date)
35 removed
(a)
(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 any one or more of the following:
(a)
(a)
26 added, 24 removed
(1)
(1) Drawings, designs, or specifications when the supplies to be furnished are to be specially manufactured for the Government in accordance with the drawings, designs, or specifications.
(1)
(1) At any time, the Contracting Officer may issue a written order to make changes within the scope of this contract in any one or more of the following:
13 added, 5 removed
(2)
(2) Method of shipment or packing.
(2)
(i) Drawings, designs, or specifications which require special manufacturing of supplies for the Government.
5 added, 3 removed
(3)
(3) Place of delivery.
(3)
(ii) Method of shipment or packing.
3 added, 83 removed
(b)
(b) If any such change causes an increase or decrease in the estimated cost of, or the time required for, performance of any part of the work under this contract, whether or not changed by the order, or otherwise affects any other terms and conditions of this contract, the Contracting Officer shall make an equitable adjustment in the (1) estimated cost, delivery or completion schedule, or both; (2) amount of any fixed fee; and (3) other affected terms and shall modify the contract accordingly.
(b)
(iii) Place of delivery.
19 added
(2)
(2)
(2) If there are any sureties, the Contracting Officer does not need to notify them of a written order.
58 added
(b)
(b)
(b) If any such change causes an increase or decrease in the estimated cost of, or the time required for, performance of any part of the work under this contract, whether or not changed by the order, or otherwise affects any other terms and conditions of this contract, the Contracting Officer shall make an equitable adjustment in the—
9 added
(1)
(1)
(1) Estimated cost, delivery or completion schedule, or both;
7 added
(2)
(2)
(2) Amount of any fixed fee; and
10 added
(3)
(3)
(3) Other affected terms and shall modify the contract accordingly.
(c)
(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.
(c)
(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)
(d) 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.
(d)
(d) 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.
3 added, 1 removed
(e)
(e) Notwithstanding the terms and conditions of paragraphs (a) and (b) above, the estimated cost of this contract and, if this contract is incrementally funded, the funds allotted for the performance of this contract, shall not be increased or considered to be increased except by specific written modification of the contract indicating the new contract estimated cost and, if this contract is incrementally funded, the new amount allotted to the contract. Until this modification is made, the Contractor shall not be obligated to continue performance or incur costs beyond the point established in the Limitation of Cost or Limitation of Funds clause of this contract.
(e)
(e) Notwithstanding the terms and conditions of paragraphs (a) and (b) of this clause, the estimated cost of this contract and, if this contract is incrementally funded, the funds allotted for the performance of this contract, shall not be increased or considered to be increased except by specific written modification of the contract indicating the new contract estimated cost and, if this contract is incrementally funded, the new amount allotted to the contract. Until this modification is made, the Contractor shall not be obligated to continue performance or incur costs beyond the point established in the Limitation of Cost or Limitation of Funds clause of this contract.
(End of clause)
(End of clause)
2 added, 2 removed
Alternate I (APR 1984). If the requirement is for services and no supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
Alternate I (Deviation Date). If the requirement is for services and no supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
7 added, 14 removed
(a)
(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 any one or more of the following:
(a)
(a)(1) At any time, the Contracting Officer may issue a written order to make changes within the scope of this contract in any one or more of the following:
1 added, 1 removed
(1)
(1) Description of services to be performed.
(1)
(i) Description of services to be performed.
1 added, 1 removed
(2)
(2) Time of performance (i.e., hours of the day, days of the week, etc.).
(2)
(ii) Time of performance (i.e., hours of the day, days of the week, etc.).
1 added, 1 removed
(3)
(3) Place of performance of the services.
(3)
(iii) Place of performance of the services.
15 added, 24 removed
(2)
Alternate II (APR 1984). If the requirement is for services and supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
(2)
(2) If there are any sureties, the Contracting Officer does not need to notify them of a written order.
25 added, 33 removed
(a)
(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 any one or more of the following:
(a)
Alternate II (Deviation Date). If the requirement is for services and supplies are to be furnished, substitute the following paragraph (a) for paragraph (a) of the basic clause:
28 added, 6 removed
(1)
(1) Description of services to be performed.
(1)
(a)(1) At any time, the Contracting Officer may issue a written order to make changes within the scope of this contract in any one or more of the following:
6 added, 13 removed
(2)
(2) Time of performance (i.e., hours of the day, days of the week, etc.).
(2)
(i) Description of services to be performed.
10 added, 3 removed
(3)
(3) Place of performance of the services.
(3)
(ii) Time of performance (i.e., hours of the day, days of the week, etc.).
6 added, 26 removed
(4)
(4) Drawings, designs, or specifications when the supplies to be furnished are to be specially manufactured for the Government in accordance with the drawings, designs, or specifications.
(4)
(iii) Place of performance of the services.
13 added, 7 removed
(5)
(5) Method of shipment or packing of supplies.
(5)
(iv) Drawings, designs, or specifications which require special manufacturing of supplies for the Government.
7 added, 3 removed
(6)
(6) Place of delivery.
(6)
(v) Method of shipment or packing of supplies.
3 added, 21 removed
(vi)
Alternate III (APR 1984). If the requirement is for construction, substitute the following paragraph (a) for paragraph (a) of the basic clause:
(vi)
(vi) Place of delivery.
15 added, 35 removed
(a)
(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 plans and specifications or instructions incorporated in the contract.
(a)
(2) If there are any sureties, the Contracting Officer does not need to notify them of a written order.
22 added
Alternate III (Deviation Date). If the requirement is for construction, substitute the following paragraph (a) for paragraph (a) of the basic clause:
32 added
(a)(1)
(a)(1)
(a)(1) At any time, the Contracting Officer may issue a written order to make changes within the scope of this contract in the plans and specifications or instructions incorporated in the contract.
19 added
(2)
(2)
(2) If there are any sureties, the Contracting Officer does not need to notify them of a written order.
Alternate IV
[Reserved]
Alternate IV [Reserved]
6 added, 6 removed
Alternate V (APR 1984). If the requirement is for research and development, and it is desired to include the clause, substitute the following subparagraphs (a)(1) and (a)(3) for subparagraphs (a)(1) and (a)(3) of the basic clause:
Alternate V (Deviation Date). If the requirement is for research and development, and it is desired to include the clause, substitute the following subparagraphs (a)(1)(i) and (a)(1)(iii) for subparagraphs (a)(1)(i) and (a)(1)(iii) of the basic clause:
1 added, 1 removed
(a)(1)
(a)(1) Drawings, designs, or specifications.
(a)(1)
(a)(1)(i) Drawings, designs, or specifications.
1 added, 1 removed
(3)
(3) Place of inspection, delivery, or acceptance.
(3)
(iii) Place of inspection, delivery, or acceptance.
21 removed
[48 FR 42478, Sept. 19, 1983, as amended at 52 FR 30079, Aug. 12, 1987; 72 FR 27389, May 15, 2007]
Prescription
Substantive changes. The RFO prescription differs materially from the eCFR prescription.
(b) (1) The contracting officer shall insert the clause at 52.243-2, Changes-Cost-Reimbursement, in solicitations and contracts when a cost-reimbursement contract for supplies is contemplated.
(b)
(1) The contracting officer shall insert the clause at 52.243-2, Changes-Cost-Reimbursement, in solicitations and contracts when a cost-reimbursement contract for supplies is contemplated.
24 removed
(2)
(2) If the requirement is for services and no supplies are to be furnished, the contracting officer shall use the clause with its AlternateI.
(2)
23 removed
(3)
(3) If the requirement is for services and supplies are to be furnished, the contracting officer shall use the clause with its AlternateII.
(3)
17 removed
(4)
(4) If the requirement is for construction, the contracting officer shall use the clause with its AlternateIII.
(4)
2 removed
(5)
(5) [Reserved]
(5)
32 removed
(6)
(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.