[Code of Federal Regulations] [Title 13, Volume 1] [Revised as of January 1, 2004] From the U.S. Government Printing Office via GPO Access [CITE: 13CFR121.503] [Page 318] TITLE 13--BUSINESS CREDIT AND ASSISTANCE CHAPTER I--SMALL BUSINESS ADMINISTRATION PART 121_SMALL BUSINESS SIZE REGULATIONS--Table of Contents Subpart A_Size Eligibility Provisions and Standards Sec. 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 Sec. 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.