The city consents to and authorizes the enforcement of this article by the county, provided, however, that nothing herein shall prevent the city from enforcing this article with city staff. The city manager or airport director and any other person designated in writing by the city manager or airport director shall have the authority to enforce the California Penal Code Section 836.5 to any person operating aircraft in violation of the provisions of this article, except that in the discretion of the city manager or airport director, a written warning may be issued to any person in place of a citation for a first violation of this article. (Prior code § 4.04.109)