Section 450 - Application of article1. 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.