49 CFR 1515.1 - Scope.
(a) Appeal. This part applies to applicants who are appealing an Initial Determination of Threat Assessment or an Initial Determination of Threat Assessment and Immediate Revocation in a security threat assessment (STA) as described in each of the following:
(1) 49 CFR part 1572 for a hazardous materials endorsement (HME) or a Transportation Worker Identification Credential (TWIC).
(2) 49 CFR part 1540, subpart C, which includes individuals engaged in air cargo operations who work for certain aircraft operators, foreign air carriers, indirect air carriers (IACs), or certified cargo screening facilities.