13 CFR § 121.503 - Are SBA size determinations binding on parties?

---
identifier: "/us/cfr/t13/s121.503"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "13 CFR § 121.503 - Are SBA size determinations binding on parties?"
title_number: 13
title_name: "Business Credit and Assistance"
section_number: "121.503"
section_name: "Are SBA size determinations binding on parties?"
chapter_name: "SMALL BUSINESS ADMINISTRATION"
part_number: "121"
part_name: "SMALL BUSINESS SIZE REGULATIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "15 U.S.C. 632, 634(b)(6), 636(a)(36), 662, and 694a(9)."
regulatory_source: "61 FR 3286, Jan. 31, 1996, unless otherwise noted."
cfr_part: "121"
---


# 121.503 Are SBA size determinations binding on parties?

Formal size determinations based upon a specific Government sale or lease, or made in response to a request from another Government agency under § 121.901, are binding upon the parties. Other SBA opinions provided to contracting officers or others are only advisory, and are not binding or appealable.