It shall be unlawful for any person to cut into or make any opening in the surface of, or tunnel under, any street or sidewalk or public place in the city for any purpose whatsoever without having first secured the proper excavation permit provided for in the following section. All such permits shall be conspicuously displayed at all times at the indicated work site and shall be available for inspection by the Board of Public Works or their authorized representative or any police officer. ('74 Code, § 25-23) (Am. Ord. G-24-98, passed 6-9-98)  Penalty, see § 99.999