All concrete or stone curbs shall be cut by an experienced and competent curb cutter, and the dropping or removal of any curb shall be done only by an experienced curb setter. The replacing of a curb shall be done by the owner or by the City, through the Director of Public Service-Safety, by contract or force account as the Director may deem best, and the cost and expense for such work shall be charged against the private property contiguous to the right of way where such curb was replaced. No curb opening shall be less than twelve lineal feet in width, but as regards residential properties, having a two-car garage, an eighteen lineal foot curb opening shall be permitted. (Ord. 83-74. Passed 2-11-75.)