All sidewalk pavements laid under the provisions of this article shall be under the direct and immediate supervision and inspection of the Engineer, or his authorized representative. Any owner of property who may desire to lay a sidewalk pavement or repair the same shall, upon being granted permission therefor, notify the Engineer of the time he expects to begin such work; and when, in the judgment of the Engineer such work is not being done with the materials and in the manner and according to the specifications required by this article, he shall have the power and authority to stop such work until such owner indicates his willingness to do such work with the materials and in the manner and according to the specifications required by this article.