Cal. Food & Agric. Code § 19317

A registered transporter of inedible kitchen grease shall, whenever any contract for the transportation of inedible kitchen grease under which that transporter provides transportation services is terminated or expires, notify the county health officer for the county in which the inedible kitchen grease was collected of the termination or expiration of the contract and that the registered transporter is no longer transporting inedible kitchen grease pursuant to that contract.