California Code
ARTICLE 3 - Safety Belts and Inflatable Restraint Systems
Section 27315.5.

27315.5. All law enforcement agencies shall, not later than January 1, 1991, establish a policy and issue an order, in writing, which states whether or not their officers are required to wear seat belts. When a law enforcement agency is developing a safety belt policy, the agency shall consider the officer’s safety, comfort, and convenience.

(Added by Stats. 1990, Ch. 33, Sec. 3. Effective March 26, 1990.)