All activities accomplished for the purpose of controlling entry or reentry into an area that has either been evacuated or is under a sheltering protective action decision to minimize the radiation exposure of individuals because of radiological contamination. This function is needed to prevent the general public from entering restricted areas (sheltered and/or evacuated) and permitting only emergency workers with essential missions and limited members of the general public to enter.
The process of granting or denying specific requests to: 1) obtain and use information and related information processing services; and 2) enter specific physical facilities (e.g., federal buildings, military establishments, border crossing entrances).
(1) An aspect of security that utilizes hardware systems and specialized procedures to control and monitor the movement of individuals, vehicles, or materials into, out of, or within secured areas. Access to various points may be a function of authorization level or time, or a combination of the two. (2) The use of physical security as a means of controlling movement into or out of secured areas.
Access Control has been defined 16 different ways in documents like Best Practices for Armed Security Officers in Federal Facilities, SANS Glossary of Terms, Definitions of Diplomatic Security Terms, and 7 more.