Any work required for public safety may be done by the Department of Public Works and full cost of such work recovered from permittee providing that the permittee has been given reasonable notice prior to such work being undertaken by City forces, except in emergency situations. However, all public utilities will be notified of any work, including emergency situations, that is necessary and be given the necessary time to complete the needed work prior to action of the Department of Public Works. (Ord. 338 § 1 (part), 1967)