Section 24-513. Constructors; license and bond

a. All openings into any
  sewers or drains, for the purpose of making connection  therewith,  from
  any  house,  cellar,  vault,  yard  or  other premises, shall be made by
  persons to be licensed by the commissioner of  environmental  protection
  to  perform  such  work.  Before  being  so licensed, such persons shall
  execute a bond to the city in the sum of one thousand dollars, with  one
  or more sureties to be approved by such commissioner, conditioned:
    1.  That they will make all openings into any sewer or drain carefully
  and in the manner prescribed by such commissioner without  injuring  the
  same;
    2.  That they will leave no obstruction of any description whatever in
  the connection made by them;
    3. That they will properly close up the sewer  or  drain  around  such
  connection and make no opening into the arch of any sewer or drain;
    4.  That  they  will  faithfully comply with the provisions of section
  eighty-six of the charter,  subchapter  one  of  chapter  one  of  title
  nineteen and sections 3-508 and 3-509 of the code;
    5.  That they will be responsible for any damages or injuries that may
  accrue to persons, animals or property, by reason of any opening in  any
  street made by them or those in their employ;
    6.  That they will properly refill and ram the earth, suitably restore
  the pavement taken up for excavating, and  repave  the  same  should  it
  settle  or become out of order within six months thereafter. In case any
  person so licensed shall  neglect  to  repair  the  pavement  aforesaid,
  within  twenty-four  hours  after  being  notified,  the commissioner of
  transportation may cause the same to be  done  and  charge  the  expense
  thereof to such licensee.