§ 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.