Section 19-102. Unlawful use or opening of street

Except as otherwise
  provided by law, no person shall remove, open or otherwise  disturb  the
  pavement  of,  or  excavate  in,  a  public street, or use any part of a
  public street so as to obstruct travel therein (i) without a permit from
  the commissioner,  and  (ii)  unless  such  removal,  opening  or  other
  disturbance  of the pavement or such excavation or use is carried out in
  accordance with the provisions of this subchapter and of section  24-521
  of  the  code,  the  rules of the department in relation thereto and the
  terms and conditions of such permit.