What this form is
Official title: Amendment of Solicitation/Modification of Contract
Current edition: Standard Form 30 (REV. 11/2016)
Prescribed by: GSA — FAR 53.243; used for solicitation amendments (FAR 14.208), change orders and modifications (FAR 43.301), and termination notices
Official download: https://www.gsa.gov/system/files/SF30-16c.pdf
One form, two jobs: item 9 route = amending a solicitation before award; item 10 route = modifying an existing contract/order.
The items, one by one
| Block | Label on the form | Who fills it in, and with what |
|---|---|---|
| 1 | CONTRACT ID CODE (+ PAGE OF PAGES) | Government |
| 2 | AMENDMENT/MODIFICATION NUMBER | Government |
| 3 | EFFECTIVE DATE | Government — per the back-page rules (issue date for amendments/change orders; agreed date for supplemental agreements) |
| 4 | REQUISITION/PURCHASE REQUISITION NUMBER | Government |
| 5 | PROJECT NUMBER (If applicable) | Government |
| 6 | ISSUED BY / CODE | Government |
| 7 | ADMINISTERED BY (If other than Item 6) | Government |
| 8 | NAME AND ADDRESS OF CONTRACTOR (+ CODE, FACILITY CODE) | Government — also used by the offeror when acknowledging an amendment by returning the form (method (a)) |
| 9A/9B | AMENDMENT OF SOLICITATION NUMBER / DATED | Government — checked when amending a solicitation |
| 10A/10B | MODIFICATION OF CONTRACT/ORDER NUMBER / DATED | Government — checked when modifying a contract or order |
| 11 | THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS — offer deadline [is extended] [is not extended]; three acknowledgment methods; and the all-caps warning that failure to acknowledge by the deadline MAY RESULT IN REJECTION OF YOUR OFFER | Government sets it; Offeror must acknowledge by one of the three listed methods |
| 12 | ACCOUNTING AND APPROPRIATION DATA (If required) | Government |
| 13 | THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS — A. change order authority; B. administrative changes (FAR 43.103(b)); C. supplemental agreement authority; D. other; E. contractor [is not] [is required] to sign and return ___ copies | Government — the legal authority for the mod, and whether your signature is required |
| 14 | DESCRIPTION OF AMENDMENT/MODIFICATION (organized by UCF section headings) | Government — back-page instructions require the net price impact to be stated |
| 15A/B/C | NAME AND TITLE OF SIGNER / CONTRACTOR/OFFEROR signature / DATE SIGNED | Contractor — only when item 13E requires it |
| 16A/B/C | NAME AND TITLE OF CONTRACTING OFFICER / UNITED STATES OF AMERICA (Signature of CO) / DATE SIGNED | Government — per the back page, the CO ordinarily signs supplemental agreements last |
Common mistakes
- Blowing the acknowledgment. Item 11's own capitalized warning: failure to get your acknowledgment to the designated office before the due date
MAY RESULT IN REJECTION OF YOUR OFFER
. Acknowledge every amendment, every time, by one of the three methods the item lists. - Signature confusion on modifications. Item 13E states whether contractor signature is required. Unilateral change orders don't need it; bilateral supplemental agreements do — and the CO signs last, so don't wait for a government-signed copy before returning yours.
- A vague item 14. The back-page instructions require the description to state the price impact (increased/decreased/unchanged) and follow UCF section organization — sloppy item 14s create audit and closeout disputes.
FAQ
How do I acknowledge a solicitation amendment on the SF 30?
Item 11 lists three methods: complete items 8 and 15 and return the specified number of copies; acknowledge on each copy of your offer; or send a separate letter or electronic communication that references the solicitation and amendment numbers — before the offer due date.
Does the contractor always sign an SF 30 modification?
No — item 13E states whether signature is required. Administrative changes and unilateral change orders don't require it; supplemental agreements do.