California Code, Elections Code - ELEC § 14244

If the challenge is on the ground that the person seeking to vote is not a resident of the precinct, or in an election conducted using a voter center, not a resident of the county, the person challenged shall be sworn to answer questions, and after having been sworn, a member of the precinct board shall ask that person: “Are you a resident of this precinct?” or in an election conducted using a voter center, “Are you a resident of the county?”; If the answer to the question is “Yes,” without significant qualification, no other questions shall be asked.