13 CFR § 121.403 - Are SBA size determinations and NAICS code designations binding on parties?

---
identifier: "/us/cfr/t13/s121.403"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "13 CFR § 121.403 - Are SBA size determinations and NAICS code designations binding on parties?"
title_number: 13
title_name: "Business Credit and Assistance"
section_number: "121.403"
section_name: "Are SBA size determinations and NAICS code designations 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"
---


# 121.403 Are SBA size determinations and NAICS code designations binding on parties?

Formal size determinations and NAICS code designations made by authorized SBA officials are binding upon the parties. Opinions otherwise provided by SBA officials to contracting officers or others are advisory in nature, and are not binding or appealable.

[61 FR 3286, Jan. 31, 1996, as amended at 65 FR 30863, May 15, 2000]