Cal. Bus. & Prof. Code § 7582.26
(f) No private patrol licensee or officer, director, partner, manager, or employee of a private patrol licensee shall use or wear a badge, except while engaged in guard or patrol work and while wearing a distinctive uniform. A private patrol licensee or officer, director, partner, manager, or employee of a private patrol licensee wearing a distinctive uniform shall wear a patch on each shoulder of his or her uniform that reads “private security” and that includes the name of the private patrol company by which the person is employed or for which the person is a representative and a badge or cloth patch on the upper left breast of the uniform. All patches and badges worn on a distinctive uniform shall be of a standard design approved by the director and shall be clearly visible.
The director may assess a fine of two hundred fifty dollars ($250) per violation of this subdivision.