Code of Federal Regulations Title 33. Navigation and Navigable Waters § 33.101.525 TSA list of cancelled TWICs

(a) At Maritime Security (MARSEC) Level 1, the card validity check must be conducted using information from the TSA that is no more than 7 days old.

(b) At MARSEC Level 2, the card validity check must be conducted using information from the TSA that is no more than 1 day old.

(c) At MARSEC Level 3, the card validity check must be conducted using information from the TSA that is no more than 1 day old.

(d) The list of cancelled TWICs used to conduct the card validity check must be updated within 12 hours of any increase in MARSEC level, no matter when the information was last updated.

(e) Only the most recently obtained list of cancelled TWICs must be used to conduct card validity checks.