Cal. Food & Agric. Code § 52302

If requested by either party, the secretary or his or her designee shall be present for the sampling, provide for the collection of samples, or conduct any other aspect of the sampling or analysis process as requested. The secretary shall designate an employee or enter into an agreement with an employee or agent of the State of California or a third party unaffiliated with either party to carry out the specified sampling activity as provided in regulations adopted pursuant to Article 2 (commencing with Section 52251) of Division 18. The patentholder shall pay the fee charged by the department under regulations adopted pursuant to that article. The farmer or the agent of the farmer and the person holding the patent may be present at any collection of samples conducted pursuant to this article, and each shall be notified of the time and location of the sample taking at least 24 hours in advance.