121.505—What is the effect of a self-certification?
        
        (a) 
         A contracting officer may accept a concern's self-certification as true for the particular sale or lease involved, in the absence of a written protest by other offerors or other credible information which would cause the contracting officer or SBA to question the size of the concern.
    
    
        
        (b) 
         Procedures for protesting the self-certification of an offeror are set forth in  §§ 121.1001 through 121.1009.