Level 5 CMMC - CMMC Practices


Reference: CMMC 1.02

Family: PE

Level Introduced: 1

Escort visitors and monitor visitor activity.

CMMC Clarification:
Do not allow visitors, even those people you know well, to walk around your facility without an escort. Make sure that all non-employees wear special visitor badges and/or are escorted by an employee at all times while on your property.

Coming back from a meeting, you see the friend of a coworker walking down the hallway near your office. You know this person well and trust them, but are not sure why they are in the building. You stop to talk, and the person explains that they are supposed to meet the coworker for lunch, but cannot remember where the lunchroom is. You offer to walk the person back to the reception area to get a visitor badge and wait until someone can escort them to the lunch room. You report this incident, and the company decides to install a badge reader at the main door so visitors cannot enter without an escort.


Escort visitors and monitor visitor activity.

Individuals with permanent physical access authorization credentials are not considered visitors. Audit logs can be used to monitor visitor activity.

Source: NIST Special Publication 800-171 Rev. 2



The organization:
    a. Enforces physical access authorizations at [Assignment: organization-defined entry/exit points to the facility where the information system resides] by;
        1. Verifying individual access authorizations before granting access to the facility; and
        2. Controlling ingress/egress to the facility using [Selection (one or more): [Assignment: organization-defined physical access control systems/devices]; guards];
    b. Maintains physical access audit logs for [Assignment: organization-defined entry/exit points];
    c. Provides [Assignment: organization-defined security safeguards] to control access to areas within the facility officially designated as publicly accessible;
    d. Escorts visitors and monitors visitor activity [Assignment: organization-defined circumstances requiring visitor escorts and monitoring];
    e. Secures keys, combinations, and other physical access devices;
    f. Inventories [Assignment: organization-defined physical access devices] every [Assignment: organization-defined frequency]; and
    g. Changes combinations and keys [Assignment: organization-defined frequency] and/or when keys are lost, combinations are compromised, or individuals are transferred or terminated.

Supplemental Guidance:
This control applies to organizational employees and visitors. Individuals (e.g., employees, contractors, and others) with permanent physical access authorization credentials are not considered visitors. Organizations determine the types of facility guards needed including, for example, professional physical security staff or other personnel such as administrative staff or information system users. Physical access devices include, for example, keys, locks, combinations, and card readers. Safeguards for publicly accessible areas within organizational facilities include, for example, cameras, monitoring by guards, and isolating selected information systems and/or system components in secured areas. Physical access control systems comply with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. The Federal Identity, Credential, and Access Management Program provides implementation guidance for identity, credential, and access management capabilities for physical access control systems. Organizations have flexibility in the types of audit logs employed. Audit logs can be procedural (e.g., a written log of individuals accessing the facility and when such access occurred), automated (e.g., capturing ID provided by a PIV card), or some combination thereof. Physical access points can include facility access points, interior access points to information systems and/or components requiring supplemental access controls, or both. Components of organizational information systems (e.g., workstations, terminals) may be located in areas designated as publicly accessible with organizations safeguarding access to such devices. Related controls: AU-2, AU-6, MP-2, MP-4, PE-2, PE-4, PE-5, PS-3, RA-3.

Source: NIST Special Publication 800-53 Rev. 4

Source: CMMC v1.02