It is the duty and obligation of all owners, occupants, and users of real property abutting upon streets within the city at their own cost and expense, to keep and maintain the sidewalks (and paving laid thereon) bordering their property level, at curb grade, and free to depressions, excavations, elevations, inequalities, obstacles, obstructions, or encroachments, natural or artificial, above or below ground level, or which overlap, impinge upon, or appropriate any part of the sidewalk area or the space up to eight feet above it; and to allow no oils, greases, ice, snow or water to collect or remain thereon; and, generally, in every manner, to keep such sidewalks in a safe adequate, and in defective condition so that they are easily accessible to and may be freely and safely used by the public for travel by foot.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.15)
Where and when, by reason of a violation of any of the foregoing provisions, injury or damage is occasioned to or inflicted upon any person, whether on the sidewalk or in the street, primary liability for all such injury or damage shall rest upon the owner, occupant, and user of the property abutting upon such defective sidewalk.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.16)
For the purpose of this article the following definitions shall apply unless the context clearly indicates or requires a different meaning.
Owner.
The property owner, occupant, or user, individual or firm having the work done by the contractor.
Contractor.
The person, partnership, corporation or other entity, which undertakes or contracts to construct sidewalks in city streets and alleys.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.17)
It shall be unlawful for any person, partnership or corporation to construct, reconstruct or repair any sidewalk in the city without first obtaining a permit for such work from the city manager, applications for which shall be made on forms furnished by the city.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.18)
No permit issued under this article or any construction to be done thereunder, shall be assigned, transferred or sublet but the permittee shall remain in personal charge of all work done thereafter.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.19)
(a) 
The city manager or some city street or building official or engineer designated by the city manager shall furnish information establishing lines and grades for the construction, reconstruction or repair of any improvement covered by this article, after a permit has been granted for such construction, and all such construction shall be in accordance with such lines and grades and subject to approval of the city manager or such official designated by him. Stakes shall be set by or at the expense of the contractor.
(b) 
All sidewalks shall be constructed in compliance with ADA regulations.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.20; Ordinance adopting Code)
No materials shall be used in any construction mentioned in this article until the same has been inspected and approved by the city manager and any such material which is not approved by the city manager shall be removed from the streets and sidewalks at the expense of the contractor. No concrete mixture shall be poured until forms and excavations have been inspected and approved by the city manager or his authorized representative.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.21)
No more than one-third of the width of the street shall be occupied by materials, equipment or tools and barricades shall be placed around such equipment so as to leave at lease two-thirds of such street open for traffic, which barricades and street obstructions shall be supplied with lights at nighttime so that the same will serve as protection to the public as a result of such obstruction in such streets.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.22)
Any contractor who violates any provision or requirement of this article as hereinbefore or hereinafter set out, shall be guilty of a misdemeanor and may be punished in accordance with the general penalty provision set forth in Section 1.109 of this code. Any contractor who shall sublet or assign his contract or permit any other to have control of such work, shall not receive any other or further permits to do any kind of construction work covered by this article, as the penalties for such violation.
(1995 Code of Ordinances, Title IX, Chapter 96, Section 96.23)