SCP

Level 0 (for general use) - issued to employees not involved in the containment of anomalous objects, as well as those who do not require access to such data.
Level 1 (for official use only) - for employees working near anomalous objects but not having direct or indirect access to them, as well as for those working with classified information.
Level 2 (Restricted Use) - For security personnel and researchers who require direct access to basic information about anomalous objects.
Level 3 (Secret) - For senior security personnel and researchers who require access to detailed information about anomalies, including their origins and long-term plans.
Level 4 (Top Secret) - For senior management personnel who require access to all institutional or regional information, as well as long-term operational and research project plans.
Level 5 (Thaumiel) - for senior management, such as O5 Council members.

Class E. Temporary designation assigned to field agents and containment personnel if, during the establishment of a new facility,

Class D. Assigned to expendable personnel used to work with extremely dangerous anomalies. They are prohibited from contact with Class A or B personnel. Typically recruited from prison populations, preference is given to those convicted of violent crimes, especially those sentenced to death.

Class C: Assigned to personnel with direct access to most anomalies that do not pose a threat or exhibit hostility.

Class B. Assigned to personnel deemed essential to the Foundation's local operations. They are permitted access only to anomalous objects, creatures, and phenomena that have been quarantined and have undergone measures to block potential mental or memetic influence.

Class A. Assigned to personnel deemed vital to the Foundation's strategic operations. They are prohibited from direct access to anomalous objects. If for any reason they must be in their vicinity, they are required to remain in secure areas at all times. In emergency situations, they must be immediately evacuated to a pre-designated secure area. O5 Council members are assigned Class A on a permanent basis.