SBA may initiate an SDB determination on any firm that has been certified to be an SDB by a procuring agency or that has represented itself to be an SDB on a subcontract to a federal prime contract whenever it receives credible information calling into question the SDB status of the firm. Upon its completion of an SDB determination, SBA will issue a written decision regarding the SDB status of the questioned firm. If SBA finds that the firm continues to qualify as an SDB, the determination remains in effect for three years from the date of the decision.