Cal. Elec. Code § 6583

Any nomination paper may be presented in sections. Each section shall contain the name of the presidential preference candidate, or the names of the candidates for delegates comprising the group, and, if applicable, that they have expressed a preference for a named person as candidate for presidential nominee of the party. Each section shall bear the name of the county in which it is circulated. Only voters of the county registered as intending to affiliate with the American Independent Party are competent to sign.