The Commissioner of Emergency Services and Public Protection may, upon the application of any person, firm or corporation operating an armored car service within this state, commission during his pleasure one or more suitable persons, designated by such armored car operator, who regularly transport securities across state lines and who, having been sworn, may act at the expense of such armored car operator as policemen upon the premises used or occupied by such armored car operator in its business or in or upon armored car vehicles or upon any highway adjacent to such premises for the proper protection of such property and such armored car vehicles and their contents.