Section 86. Payment by city of New York

For the purpose of carrying out any
  work  which may be required to be done by the city of New York under the
  provisions of this article, and to provide  the  means  for  doing  such
  work,  said  city  must  at  all  times make the necessary appropriation
  therefor, to be levied and collected in the next annual  tax  levy.  The
  commissioner  of  environmental  protection, in the city of New York, is
  hereby  authorized  to  enter  into  a  contract  with  any  person   or
  corporation  for  the  doing  of  said  work,  in the manner provided by
  chapter thirteen of the New York city charter and  chapter  thirteen  of
  the administrative code of the city of New York.