33CFR 104.265(e)(2)
Security measures for access control.
    (e) MARSEC Level 1. The vessel owner or operator must ensure security measures in this paragraph are implemented to:
    (2) Conspicuously post signs that describe security measures currently in effect and clearly state that:
    (i) Boarding the vessel is deemed valid consent to screening or inspection; and
    (ii) Failure to consent or submit to screening or inspection will result in denial or revocation of authorization to board;

33CFR 105.255(e)(2)
Security measures for access control.
    (e) MARSEC Level 1. The facility owner or operator must ensure the following security measures are implemented at the facility:
    (2) Conspicuously post signs that describe security measures currently in effect and clearly state that:
    (i) Entering the facility is deemed valid consent to screening or inspection; and
    (ii) Failure to consent or submit to screening or inspection will result in denial or revocation of authorization to enter;

33CFR 104.270(c)(6)
Security measures for restricted areas.
    (c) The vessel owner or operator must ensure security measures and policies are established to:
    (6) Clearly mark all restricted areas and indicate that access to the area is restricted and that unauthorized presence within the area constitutes a breach of security.

33CFR 105.260(c)(6)
Security measures for restricted areas.
    (c) The [facility] owner or operator must ensure that all restricted areas have clearly established security measures to:
    (6) Clearly mark all restricted areas and indicate that access to the area is restricted and that unauthorized presence within the area constitutes a breach of security;

33CFR 104.200(b)(12)(iii)
Owner or operator.
    (b) For each vessel, the vessel owner or operator must:
    (12) Ensure that TWIC procedures are implemented as set forth in this part, including;
    (iii) Notifying vessel employees, and passengers if applicable, of what parts of the vessel are secure areas, employee access areas, and passenger access areas, as applicable, and ensuring such areas are clearly marked.

33CFR 105.200(b)(6)(iii)
Owner or operator.
    (b) For each facility, the facility owner or operator must:
    (6) Ensure that the TWIC program is properly implemented as set forth in this part, including;
    (iii) Notifying facility employees, and passengers if applicable, of what parts of the facility are secure areas and public access areas, as applicable, and ensuring such areas are clearly marked.

ISPS Part B 9.20
    The SSP should provide that all restricted areas should be clearly marked indicating that access to the area is restricted and that unauthorized presence within the area constitutes a breach of security.

ISPS Part B 16.23
    The PFSP should provide that all restricted areas should be clearly marked indicating that access to the area is restricted and that unauthorized presence within the area constitutes a breach of security.

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