2006 New York Code - This Article Not Retroactive Under Certain Conditions.

 
    § 19.05. This   article  not  retroactive  under  certain  conditions.
  Sections 19.01 and 19.03 of this article shall not  be  retroactive  for
  any booth approved by the appropriate public authority or official prior
  to  March third, nineteen hundred forty-one, provided such booth have or
  be so reconstructed of the  same  material  as  to  have  dimensions  as
  specified  in section 19.03 of this article; provided such booth conform
  to the specification of section 19.03 of this article  as  regards  vent
  flue,  box  for  storage  of  films,  specifications  for  rewinding and
  repairing films and specifications for windows and doors,  and  provided
  such booth be of rigid fireproof material, and be insulated so as not to
  conduct  electricity  to  any  other  part  of  the  building  and be so
  separated from any adjacent combustible material as not  to  communicate
  fire through intense heat in case of combustion within the booth.