Code of Federal Regulations Title 49. Transportation § 49.1570.303 Inspection of credential

(a) Each person who has been issued or possesses a TWIC must present the TWIC for inspection upon a request from TSA, the Coast Guard, or other authorized DHS representative;  an authorized representative of the National Transportation Safety Board;  or a Federal, State, or local law enforcement officer.

(b) Each person who has been issued or who possesses a TWIC must allow his or her TWIC to be read by a reader and must submit his or her reference biometric, such as a fingerprint, and any other required information, such as a PIN, to the reader, upon a request from TSA, the Coast Guard, other authorized DHS representative;  or a Federal, State, or local law enforcement officer.