13 CFR § 121.403
Are SBA size determinations and NAICS code designations binding on parties?
November 10, 2020
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]