Cal. Elec. Code § 15630
All ballots, whether voted or not, and any other relevant material, may be examined as part of any recount if the voter filing the declaration requesting the recount so requests.
No examination of any ballot shall include touching or handling the ballot without the express consent of the elections official or the election officer supervising the special recount board. No ballot may be touched or handled during the examination unless the elections official or the elections officer supervising the special recount is present to observe the examination.
Except as provided in this section no ballot shall be touched or handled by any person during the recount unless that person is the elections official, a person acting at the direction of the elections official, a member of the special recount board, or by order of the superior court.
Ca. Elec. Code § 15630