Section 17504 Of Chapter 6. Miscellaneous Provisions From California Elections Code >> Division 17. >> Chapter 6.

. (a) The following provisions apply to those elections where candidates for one or more of the following offices are voted upon: President of the United States, Vice President of the United States, United States Senator, and United States Representative.
  (b) The elections official shall preserve all applications for vote by mail ballots for a period of 22 months from the date of the election.