Cal. Gov. Code § 53023

Notwithstanding any other provisions of law or any local ordinance all the privileges and immunities from liability, exemptions from laws and rules, all pension, relief, disability, workmen’s compensation, and other benefits, which apply to officers, agents, or employees of the local agency when performing functions within the local agency’s limits apply to them to the same extent while performing functions extraterritorially pursuant to this article.