The Transportation Security Administration (TSA) has issued an amendment to its standard security programs, effective January 31, 2019, making it a requirement for participating aircraft operators to remove Known Crewmember (KCM) access for the duration of time prescribed by TSA for any crewmember who has been disqualified from participation in the KCM program. Among other things, TSA has developed a program that denies access to KCM expedited screening to crewmembers who commit certain violations of the Transportation Security Regulations. Crew members failing to comply with specified security requirements could have their KCM privileges suspended or revoked accordingly. The TSA program is considered Sensitive Security Information (SSI) and therefore not eligible for publication in the public domain. However, if a crewmember commits certain violations of federal security regulations, such as interference with security operations, access control violations, providing false or fraudulent documents, making a bomb threat, or bringing a firearm, explosive, or other prohibited item to an airport or onboard an aircraft, s/he will be denied KCM privileges for a specified time. The duration of disqualification from KCM privileges is related to the seriousness of the violation and/or a repeated history of regulatory violations. Additional information may be made available upon approval from TSA.