Cal. Sts. & High. Code § 18395

Whenever any lot or parcel of land belonging to the United States or to the State of California or to any county, city, public agent, mandatory of the government, school board, educational, penal or reform institution, or institution for the feeble-minded or the insane and being in use in the performance of any public function abuts the public streets, in which street lighting systems are located and are to be improved under the proceedings, the city council may, by resolution adopted prior to the levy of any installment assessment, declare that the said lots or parcels of land or any of them shall be omitted from the installment assessments thereafter to be levied to cover the costs and expenses of the improvement.