Constitution of the State of California 1879 Art. VII, § 7

Sec. 7.  A person holding a lucrative office under the United States or other power may not hold a civil office of profit.  A local officer or postmaster whose compensation does not exceed 500 dollars per year or an officer in the militia or a member of a reserve component of the armed forces of the United States except where on active federal duty for more than 30 days in any year is not a holder of a lucrative office, nor is the holding of a civil office of profit affected by this military service.