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FAR Clause

52.243-4

Changes.
View on acquisition.gov · View on eCFR.gov
Effective Date
JUN 2007
Active Deviations
Versions
1 (since 2017-01-01)
RFO
RFO Version Available

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.

View RFO version
52.243-4 Changes.

As prescribed in 43.205(d), insert the following clause. The 30-day period may be varied according to agency procedures.

Changes (JUN 2007)

(a) The Contracting Officer may, at any time, without notice to the sureties, if any, by written order designated or indicated to be a change order, make changes in the work within the general scope of the contract, including changes—

(1) In the specifications (including drawings and designs);

(2) In the method or manner of performance of the work;

(3) In the Government-furnished property or services; or

(4) Directing acceleration in the performance of the work.

(b) Any other written or oral order (which, as used in this paragraph (b), includes direction, instruction, interpretation, or determination) from the Contracting Officer that causes a change shall be treated as a change order under this clause;
provided,
that the Contractor gives the Contracting Officer written notice stating (1) the date, circumstances, and source of the order and (2) that the Contractor regards the order as a change order.

(c) Except as provided in this clause, no order, statement, or conduct of the Contracting Officer shall be treated as a change under this clause or entitle the Contractor to an equitable adjustment.

(d) If any change under this clause causes an increase or decrease in the Contractor's cost of, or the time required for, the performance of any part of the work under this contract, whether or not changed by any such order, the Contracting Officer shall make an equitable adjustment and modify the contract in writing. However, except for an adjustment based on defective specifications, no adjustment for any change under paragraph (b) of this clause shall be made for any costs incurred more than 20 days before the Contractor gives written notice as required. In the case of defective specifications for which the Government is responsible, the equitable adjustment shall include any increased cost reasonably incurred by the Contractor in attempting to comply with the defective specifications.

(e) The Contractor must assert its right to an adjustment under this clause within 30 days after (1) receipt of a written change order under paragraph (a) of this clause or (2) the furnishing of a written notice under paragraph (b) of this clause, by submitting to the Contracting Officer a written statement describing the general nature and amount of proposal, unless this period is extended by the Government. The statement of proposal for adjustment may be included in the notice under paragraph (b) above.

(f) No proposal by the Contractor for an equitable adjustment shall be allowed if asserted after final payment under this contract.

(End of clause)

[48 FR 42478, Sept. 19, 1983, as amended at 52 FR 30079, Aug. 12, 1987; 72 FR 27389, May 15, 2007]
43.205(d)
(d) The contracting officer shall insert the clause at 52.243-4, Changes, in solicitations and contracts for-

(1) Dismantling, demolition, or removal of improvements; and

(2) Construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold.
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.

RFO RFO Version Overhauled 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.

Search on acquisition.gov

FAR FAR Prescription 43.205(d)
(d) The contracting officer shall insert the clause at 52.243-4, Changes, in solicitations and contracts for-

(1) Dismantling, demolition, or removal of improvements; and

(2) Construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold.

View on acquisition.gov · View on eCFR.gov

Version History

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
52.243-4 Changes.
eCFR (codified)
RFO (implemented)
6 added, 9 removed
As prescribed in 43.205(d), insert the following clause. The 30-day period may be varied according to agency procedures.
As prescribed in 43.305(d), insert the following clause. Agency procedures may vary the 30-day period.
2 added, 2 removed
Changes (JUN 2007)
Changes (Deviation Date)
39 removed
(a)
(a) The Contracting Officer may, at any time, without notice to the sureties, if any, by written order designated or indicated to be a change order, make changes in the work within the general scope of the contract, including changes—
(a)
(a)
28 added, 5 removed
(1)
(1) In the specifications (including drawings and designs);
(1)
(1) At any time, the Contracting Officer may issue a written order, identified as a change order, to make changes in the work within the scope of the contract, including changes—
6 added, 9 removed
(2)
(2) In the method or manner of performance of the work;
(2)
(i) In the specifications (including drawings and designs);
8 added, 5 removed
(3)
(3) In the Government-furnished property or services; or
(3)
(ii) In the method or manner of performance of the work;
6 added, 7 removed
(4)
(4) Directing acceleration in the performance of the work.
(4)
(iii) In the Government-furnished property or services; or
5 added, 66 removed
(b)
(b) Any other written or oral order (which, as used in this paragraph (b), includes direction, instruction, interpretation, or determination) from the Contracting Officer that causes a change shall be treated as a change order under this clause; provided, that the Contractor gives the Contracting Officer written notice stating (1) the date, circumstances, and source of the order and (2) that the Contractor regards the order as a change order.
(b)
(iv) Directing acceleration in the performance of the work.
19 added
(2)
(2)
(2) If there are any sureties, the Contracting Officer does not need to notify them of a written order.
49 added
(b)
(b)
(b) Any other written or oral order (which, as used in this paragraph (b), includes direction, instruction, interpretation, or determination) from the Contracting Officer that causes a change shall be treated as a change order under this clause; provided, that the Contractor gives the Contracting Officer written notice stating—
10 added
(1)
(1)
(1) The date, circumstances, and source of the order; and
11 added
(2)
(2)
(2) That the Contractor regards the order as a change order.
84 removed
(e)
(e) The Contractor must assert its right to an adjustment under this clause within 30 days after (1) receipt of a written change order under paragraph (a) of this clause or (2) the furnishing of a written notice under paragraph (b) of this clause, by submitting to the Contracting Officer a written statement describing the general nature and amount of proposal, unless this period is extended by the Government. The statement of proposal for adjustment may be included in the notice under paragraph (b) above.
(e)
(e)
42 added
(1)
(1)
(1) The Contractor must assert its right to an adjustment under this clause, by submitting to the Contracting Officer a written statement describing the general nature and amount of proposal within 30 days, unless this period is extended by the Government, after—
14 added
(i)
(i)
(i) Receipt of a written change order under paragraph (a) of this clause; or
13 added
(ii)
(ii)
(ii) The furnishing of a written notice under paragraph (b) of this clause.
19 added
(2)
(2)
(2) The statement of proposal for adjustment may be included in the notice under paragraph (b) of this clause.
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.
eCFR (codified)
RFO (implemented)
Unchanged
52.243-4 Changes.: Prescription
eCFR (codified)
RFO (implemented)
8 removed
(1)
(1) Dismantling, demolition, or removal of improvements; and
(1)
20 removed
(2)
(2) Construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold.
(2)

Source: acquisition.gov RFO Part 52 · Prescribing Part 43

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