Section 14. Permits for erection of booths and arches

The mayor of any city
  of  the first class or the commissioner of transportation in the city of
  New York, may, in  his  discretion,  grant  temporary  permits  for  the
  erection  of booths, stands, arches, overhead passageways, or flagstaffs
  for the stringing of flags or banners, upon or  over  the  sidewalks  or
  streets   of  such  city  for  the  purpose  of  a  public  celebration,
  exposition, fair, political demonstration or any charitable or patriotic
  drive, function or celebration; provided, however, that no  such  permit
  shall  be granted for the erection of any such structure or device which
  is to be used in whole or in part for business or commercial advertising
  purposes. No such permit shall be granted  by  virtue  of  this  section
  without  the consent of the owners of the abutting property constituting
  more than one-half of the foot frontage upon both sides of  such  street
  in  the  block  formed by the nearest cross-streets on each side of such
  structure or erection.