Cal. Sts. & High. Code § 679

Any city, municipal utility district, municipal water district or metropolitan water district is entitled to a blanket permit, renewable annually, for the installation of its service connections and for ordinary maintenance of its facilities located or installed in State highways; but the department may revoke any such blanket permit if the permittee fails to comply with the provisions of this article. When any such permit is revoked in a proper case such municipal utility district, municipal water district or metropolitan water district is entitled to a permit only on furnishing a bond as provided in section 677.