It is unlawful for any person to dig up, break, excavate, tunnel, undermine, cut, or in any way obstruct or disturb any public properties in the City or to fill in, place, leave, or deposit in, or upon, any public properties any earth, refuse, gravel, rock, or other material or thing tending to obstruct, disturb, or interfere with the free use of the same for the installation and/or maintenance of a gas distribution or transmission system or for the purpose of making a utility connection with any premises, without first having obtained a permit, or without complying with the provisions of this chapter, other applicable chapters, and rules and regulations of the City Engineer, nor shall any person conduct such work in a manner at variance with the terms of any such permit; provided, however, that in case of an emergency arising out of office hours, when an immediate excavation may be necessary for the protection of public or private property, the same shall be reported to the Police Department, and the necessary excavation may be made upon the express condition that an application be made, in the manner herein provided, on or before noon of the next following business day; and provided, further, that a separate permit shall be required for each unit. [Ord. 4515 § 2, 2021; Ord. 1503 § 20, 1971; Code 1970 § 16.12.200.]