TL-SEC-001 Reference — Endorsements & Facility Conditions

Derived reference: This page reorganizes sections 3 and 4 of TL-SEC-001 — Security Access Classification System for rapid lookup. TL-SEC-001 remains the controlling policy. Source download: Metadata-scrubbed TL-SEC-001 PDF

Endorsements qualify a physical security level for a specialized function. They are additive, not hierarchical, and do not replace information classification, compartment authorization, or need-to-know.

Endorsement codes

Code	Endorsement	Scope
/A	Archives	Secure records, controlled archives and historical holdings.
/B	Biological	Biological laboratories, quarantine and bio-containment.
/C	Containment	Containment chambers, barriers and containment-control functions.
/E	Experimental	Authorized experimental operations and controlled test execution.
/F	Field	Remote sites, expeditions and off-site research operations.
/M	Medical	Medical observation, exposure response and restricted clinical spaces.
/N	Radiological	Radiological or nuclear-controlled work areas.
/R	Recovery	Evidence, specimen and anomalous-article recovery operations.
/S	Security	Security control rooms, response functions and restricted security systems.
/T	Transport	Controlled movement of personnel, specimens and restricted materials.
/V	Vault	Secure vaults and specially controlled storage.
/X	Exceptional	Confirmed anomalous or otherwise nonstandard phenomena.

Source example: S-4 / C-R-X means Containment-level access with Containment, Recovery, and Exceptional Phenomena endorsements.

Facility security conditions

Condition	Title	Meaning and required response
White	Normal	Standard operations. Normal credential and escort rules apply.
Blue	Controlled	Heightened security. Credentials are verified at restricted boundaries; nonessential movement may be limited.
Yellow	Incident	Unresolved laboratory or facility incident. Nonessential personnel remain clear of the affected area.
Red	Containment	Confirmed containment emergency. Movement, access and communications are controlled by Security Operations / Incident Command.
Black	Facility Isolation	Facility or sector sealed. Entry and exit require incident-command authorization and accountability.
Null	Authority Suspended	Ordinary badges, standing permissions and verbal authorizations are invalid until identity, command authority and facility conditions are independently re-established.

Marking example

S-4 / C-R-X CONTAINMENT ACCESS | ENDORSEMENTS: CONTAINMENT / RECOVERY / EXCEPTIONAL

Security authority may be reduced, suspended, or superseded by a facility condition, compartment restriction, temporary operational order, or specifically issued S-X authorization.