The engineer may suspend the certificate of any contractor who shall construct any sidewalk or curb upon or along any grade or line other than those established by the engineer or who shall deviate from the plans and specifications hereinbefore mentioned, or who shall build or construct any sidewalk or curb without first obtaining from the engineer the proper grade therefor and location thereof, or who shall fail, neglect and refuse to comply with any of the other provisions of this chapter and it shall be unlawful for any such contractor to engage in the business of building, constructing or repairing sidewalks or curbs while such certificate shall remain suspended. (Ord. 97, 8-5-1910)