California Code, Government Code - GOV § 82031

“Independent expenditure” means an expenditure made by any person, including a payment of public moneys by a state or local governmental agency, in connection with a communication which expressly advocates the election or defeat of a clearly identified candidate or the qualification, passage or defeat of a clearly identified measure, or taken as a whole and in context, unambiguously urges a particular result in an election but which is not made to or at the behest of the affected candidate or committee.