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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.
52.252-4 Alterations in Contract.
As prescribed in 52.107(d), insert the following clause in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitation that apply after contract award, except for any clause authorized for use with a deviation. Include clear identification of what is being altered.
Alterations in Contract (APR 1984)
Portions of this contract are altered as follows:
(End of clause)
RFO
Prescription superseded under the RFO
The prescription shown below is from the codified eCFR. The Revolutionary FAR Overhaul relocates this clause's prescription as follows:
237.7204 → PGI 237.7204(prescriptive text also revised)
See the deviation memorandum for the current prescription authority.
This clause is prescribed in the R-DFARS by the following deviation:
2026-O0023
— DFARS RFO Implementation (Part 37)
(DFARS Part 237)
Add clause 52.252-4
52.107(d)
(d) The contracting officer shall insert the clause at 52.252-4, Alterations in Contract, in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitations that apply to the contract phase, except for any clause authorized for use with a deviation.
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.
FARFAR Prescription⚠ May be superseded by RFO52.107(d)
(d) The contracting officer shall insert the clause at 52.252-4, Alterations in Contract, in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitations that apply to the contract phase, except for any clause authorized for use with a deviation.
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
52.252-4 Alterations in Contract.
eCFR (codified)
RFO (implemented)
As prescribed in 52.107(d), insert the following clause in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitation that apply after contract award, except for any clause authorized for use with a deviation. Include clear identification of what is being altered.
As prescribed in 52.107(d) , insert the following clause in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitation that apply after contract award, except for any clause authorized for use with a deviation. Include clear identification of what is being altered.
Substantive changes. The RFO prescription differs materially from the eCFR prescription.
eCFR (codified)
RFO (implemented)
Unchanged
52.252-4 Alterations in Contract.: Prescription
eCFR (codified)
RFO (implemented)
2 added, 46 removed
(d)
(d) The contracting officer shall insert the clause at 52.252-4, Alterations in Contract, in solicitations and contracts in order to revise or supplement, as necessary, other parts of the contract, or parts of the solicitations that apply to the contract phase, except for any clause authorized for use with a deviation.