California Code, Elections Code - ELEC § 10510

(a) Forms for declarations of candidacy for all district offices shall be obtained from the office of the county elections official. The county elections official may, for convenience or necessity, authorize the district secretary to issue declarations of candidacy. The forms shall first be available on the 113th day prior to the general district election and shall be filed not later than 5 p.m. on the 88th day prior to the general district election in the office of the county elections official during regular office hours or may be filed by certified mail so that the forms reach the office of the county election official no later than the deadline for filing in that office. The county elections official shall record the date of filing upon the first page of each declaration of candidacy filed pursuant to this section. No candidate shall withdraw his or her declaration of candidacy after 5 p.m. on the 88th day prior to the general district election.

(b) Notwithstanding any other provision of law, a person shall not file nomination papers for more than one district office or term of office for the same district at the same election.

(c) On request of the district secretary, the county elections official shall provide the secretary with a copy of each declaration of candidacy filed pursuant to this section.