CA Gov't Code Section 11440.10

(a)

The agency head may do any of the following with respect to a decision of the presiding officer or the agency:

(1)

Determine to review some but not all issues, or not to exercise any review.

(2)

Delegate its review authority to one or more persons.

(3)

Authorize review by one or more persons, subject to further review by the agency head.

(b)

By regulation an agency may mandate review, or may preclude or limit review, of a decision of the presiding officer or the agency.