It shall be unlawful to erase, alter or modify any lines, figures or coloring contained upon such drawings so stamped by the Building Commissioner or filed with the Building Commissioner for reference. If, during the progress of the work it is desired to deviate in any manner affecting the construction or other essentials of the building from the terms of the application or drawing, notice of such intention to alter or deviate shall be given to the Building Commissioner and the Building Commissioner's written assent shall first be obtained before such alteration or deviation may be made, but alterations in buildings which do not involve any change in their structural parts or of their stairways, elevators, fire escapes or other means of communication or ingress or egress, or in lighting or ventilation, and that are not in violation of any of the provisions of this Code, may be made without the permission of the Building Commissioner. (Ord. 2005-24, 1-19-2006)