Government Code § 89512

(a) An expenditure to seek office is within the lawful execution of the trust imposed by Section 89510 if it is reasonably related to a political purpose. An expenditure associated with holding office is within the lawful execution of the trust imposed by Section 89510 if it is reasonably related to a legislative or governmental purpose. Expenditures which confer a substantial personal benefit shall be directly related to a political, legislative, or governmental purpose.

(b) Except as expressly authorized by this article, an expenditure for a fine, penalty, judgment, or settlement is not within the lawful execution of the trust imposed by Section 89510.