California Code, Elections Code - ELEC § 13211.5

(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) Spaces may be left on the ballot in order to keep an entire contest together in a single column or page, or to manage the arrangement of contests on the ballot.

(c) When a ballot has multiple pages or cards, an instruction shall be printed to direct the voter to continue to the next page or card.