Depending on the type of transportation (e.g. aviation) operation, the Transportation Security Administration (TSA) requires a fingerprint-based Criminal History Records Check (CHRC) on certain individuals, as described by the Code of Federal Regulations, who perform certain security-sensitive job functions. For example, a CHRC must be completed for all flight crew personnel on aircraft that operates commercially and has a maximum certificated takeoff weight (MTOW) of greater than 12,500 pounds. Also, all individuals who have unescorted access to Secure Identification Display Areas (SIDA), and all individuals who perform screening functions for passengers, checked baggage and cargo require a CHRC.
In addition:
Anyone in a TSA Standard Security Program