File:Flag of Fresno, California.svg.png

Summary
This image is a work of a State of California employee, or an employee of a local government agency (county, city, or special district) that is located in California, taken or made during the course of the person's official duties, and is consequently in the public domain.

See CA works' status. In brief, a ruling from the California Appellate court says "writings of public officials and agencies" available under California’s public records law (CPRA), are generally not subject to copyright.