2006 New York Code - General Grant Of Powers.

 
    §  19.  General  grant  of  powers.  1. Every city is granted power to
  regulate, manage and control its  property  and  local  affairs  and  is
  granted all the rights, privileges and jurisdiction necessary and proper
  for carrying such power into execution. No enumeration of powers in this
  or  any  other law shall operate to restrict the meaning of this general
  grant of power, or to exclude  other  powers  comprehended  within  this
  general grant.
    2. Whenever the constitutionality of any local law, ordinance, rule or
  regulation  of  a  city is brought into issue upon a trial or hearing of
  any civil cause of action or proceeding in any court, and  the  city  is
  not  a  party  to such action or proceeding, notice shall be served upon
  the city in accordance with section one thousand  twelve  of  the  civil
  practice law and rules.