Section 28-119.1. Connection of service utilities

It shall be unlawful for
  any utility company or utility corporation to supply gas to  a  building
  place  or  premises  in  which  new  meters  other  than replacement are
  required until a certificate of approval of gas  installation  from  the
  department  is  filed  with such utility company or utility corporation.
  When new gas service piping has been installed it shall be locked-off by
  the utility company or utility corporation either  by  locking  the  gas
  service  line valve or by installing a locking device on the outside gas
  service line valve. The lock shall not be removed until  the  gas  meter
  piping  (other than utility owned) and gas distribution piping have been
  inspected and certified as required by the department  of  buildings  as
  being ready for service.