Section 11-2327. System revenues; adjustment of surcharge

(a) All surcharge
  monies remitted to the commissioner of finance by a service supplier and
  all other monies dedicated to the payment of system costs from  whatever
  source  derived  or  received  by the city of New York shall be expended
  only upon authorization of the council, and only for payment  of  system
  costs  as  permitted  by  this chapter. The finance commissioner and the
  director of the office of management and budget shall separately account
  for and keep adequate records of the  amount  and  source  of  all  such
  revenues  and  of  the  amount and object or purpose of all expenditures
  thereof.
    (b) If at the end of any fiscal year the  total  amount  of  all  such
  revenues exceeds the amount necessary and expended for payment of system
  costs  in  such  fiscal  year,  such  unencumbered cash surplus shall be
  carried over for the payment of system costs  in  the  following  fiscal
  year.  However,  if at the end of any fiscal year such unencumbered cash
  surplus exceeds an amount equal to five per cent of that  necessary  for
  the  payment  of  system costs in such fiscal year, the council shall by
  local law reduce the surcharge for the following fiscal year to a  level
  which  more adequately reflects the system cost requirements of its E911
  system. The council may also reestablish  or  increase  such  surcharge,
  subject  to  the provisions of section three hundred three of the county
  law, if the revenues generated by such surcharge and by any other source
  are not adequate to pay for system costs.