33 C.F.R. § 104.290 Security incident procedures.
Title 33 - Navigation and Navigable Waters
For each Maritime Security (MARSEC) Level, the vessel owner or operator must ensure the Vessel Security Officer (VSO) and vessel security personnel are able to: (a) Respond to security threats or breaches of security and maintain critical vessel and vessel-to-facility interface operations, to include: (1) Prohibiting entry into affected area; (2) Denying access to the vessel, except to those responding to the emergency; (3) Implementing MARSEC Level 3 security measures throughout the vessel; (4) Stopping cargo-handling operations; and (5) Notifying shoreside authorities or other vessels of the emergency; (b) Evacuating the vessel in case of security threats or breaches of security; (c) Reporting security incidents as required in §101.305; (d) Briefing all vessel personnel on possible threats and the need for vigilance, soliciting their assistance in reporting suspicious persons, objects, or activities; and (e) Securing non-critical operations in order to focus response on critical operations.
Title 33: Navigation and Navigable Waters
PART 104—MARITIME SECURITY: VESSELS
Subpart B—Vessel Security Requirements
§ 104.290 Security incident procedures.

