California Code, Penal Code - PEN § 160

1. As used in this section, “contribution” includes the value of services provided in kind for which money would otherwise be paid, such as paid polling and resulting data, paid direct mail, paid solicitation by telephone, any paid campaign paraphernalia printed or otherwise produced, and the use of paid personnel to assist in a campaign.

2. The legislature shall provide by law for the limitation of the total contribution by any natural or artificial person to the campaign of any person for election to any office, except a federal office, to $5,000 for the primary and $5,000 for the general election, and to the approval or rejection of any question by the registered voters to $5,000, whether the office sought or the question submitted is local or for the state as a whole.  The legislature shall further provide for the punishment of the contributor, the candidate, and any other knowing party to a violation of the limit, as a felony.