Restrict Unescorted Access
Physical and Environmental Protection
NIST Control Text
Restrict unescorted access to the facility where the system resides to personnel with [Selection (one or more): security clearances for all information contained within the system; formal access authorizations for all information contained within the system; need for access to all information contained within the system; [Assignment: organization-defined physical access authorizations]].
NIST Discussion
Individuals without required security clearances, access approvals, or need to know are escorted by individuals with appropriate physical access authorizations to ensure that information is not exposed or otherwise compromised.
Parameter Values
- Selection: Formal access authorizations for all information contained within the system
SL5 Supplemental Guidance
Unescorted Red Zone access requires both formal physical-access authorization and the SenL-5 Custodial designation. SenL is an industry-adapted personnel-vetting model, not a government security clearance or adjudication. Two authorized individuals must be present at all times (two-person integrity). Personnel without both conditions—including SenL-4 designees and vendors—require continuous escort by an authorized SenL-5 Custodial designee, with all activities logged [21].