Section 450. Application of article

1. This article shall apply to persons
  engaged  in  the  manufacture,  ownership,  possession,  storage,   use,
  transportation,  purchase,  sale  or  gift  of  explosives as defined in
  subdivision one of section four hundred fifty-one of this article.
    2. This article shall not apply to explosives while being  transported
  in  conformity  with  federal  law  or regulations, nor except as may be
  herein otherwise provided to  persons  who  manufacture,  own,  possess,
  store,  use,  transport,  purchase,  sell  or give explosives within the
  territorial  boundaries  of  cities  having  more   than   one   million
  inhabitants,  nor  to  any  of the following while in the performance of
  their official duties:   the armed forces  of  the  United  States,  the
  national  guard,  the  state  guard  and  duly  constituted  police  and
  firefighting  forces  of  the  state  and  its   civil   and   political
  subdivisions.
    3.  For  all purposes of this article, explosives in the possession of
  an employee within the scope of his duties, shall be considered to be in
  the possession of the employer.