Section 10-111. Locks on motor vehicles

a. It shall be unlawful for any
  person driving or in charge of a motor vehicle to  permit  it  to  stand
  unattended  for  more than three minutes on the streets or thoroughfares
  of the city, without first stopping the engine, locking the ignition and
  removing the key.
    b. Violations. Any person who violates the provisions of this section,
  upon conviction thereof, shall be punished by a fine of  not  more  than
  five dollars or imprisonment not to exceed two days, or both. Whenever a
  police  officer shall find a motor vehicle standing in violation of this
  provision, the officer may remove the ignition key therefrom and, in the
  event that the owner or operator thereof is not present,  shall  deliver
  it  to  the  nearest patrol precinct station house within one hour after
  removing same to be held for and returned to such owner or operator.  In
  the  event the key is so delivered to a station house, the officer shall
  attach to the vehicle a tag stating where the key may be reclaimed.
    c. The provisions of this  section  shall  not  apply  to  any  person
  driving  or  in  charge  of an omnibus operated under a franchise of the
  city of New York, which has clearly marked on its exterior the  name  of
  its owner.