“The Transportation Worker Identification Credential (TWIC) is a vital security measure that will ensure individuals who pose a threat do not gain unescorted access to secure areas of the nation's maritime transportation system.

TWIC was established by Congress through the Maritime Transportation Security Act (MTSA) and is administered by the Transportation Security Administration (TSA) and U.S. Coast Guard. TWICs are tamper-resistant biometric credentials that will be issued to workers who require unescorted access to secure areas of ports, vessels, outer continental shelf facilities and all credentialed merchant mariners. It is anticipated that more than 1 million workers including longshoremen, truckers, port employees and others will be required to obtain a TWIC.”