Section 13211.5 Of Article 1. General Provisions From California Elections Code >> Division 13. >> Chapter 3. >> Article 1.

. (a) Each group of names of candidates for a particular office shall be printed in immediate succession to another group of names of candidates for a particular office so as to avoid unnecessary spacing or gaps in the sequence in which each series of groups of names are listed on the ballot.
  (b) If it is necessary to leave spaces on the ballot in order to provide for the most efficient and least costly process of printing ballots, the spaces shall be located at the end of a column, page, or ballot card wherever possible.
  (c) If due to voting system constraints it is necessary to leave a space between offices on a column, page, or ballot card, and the space exceeds one inch, written instructions and a downward arrow or other visual indicator shall be printed on the ballot to direct the voter to the next voting space.