California Code of Regulations
Title 15 - Crime Prevention and Corrections
Division 3 - Adult Institutions, Programs and Parole
Chapter 1 - Rules and Regulations of Adult Operations and Programs
Subchapter 4 - General Institution Regulations
Article 10 - Classification
Section 3377 - Facility Security Levels

(a) Level I facilities and camps consist primarily of open dormitories with a low security perimeter.

(b) Level II facilities consist primarily of open dormitories with a secure perimeter, which may include armed coverage.

(c) Level III facilities primarily have a secure perimeter with armed coverage and housing units with cells adjacent to exterior walls.

(d) Level IV facilities have a secure perimeter with internal and external armed coverage and housing units described in section 3377(c), or cell block housing with cells non-adjacent to exterior walls. A Level IV 180-design facility utilizes housing units comprised of two wings; each wing is partitioned into three self-contained "pods", each "pod" has its own dayroom and control room. Each wing is linked by a dining facility and ancillary functions. The design of the housing unit allows a 180 degree view of all cells and dayrooms from the control room. A Level IV 270-design facility utilizes housing units comprised of three connected sections and one dayroom. Portions of first and third sections extend back behind the blind side of the control room. The design of the housing unit places cells within a 270 degree circumference of a circle with the control room in the center of the circle.