34 Pa. Code § 5.51
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Fireworks-A combustible or explosive composition, substance or combination of substances, or article prepared for the purpose of producing a visible or an audible effect by combustion, explosion, deflagration or detonation.
Fireworks factory building-A building or structure in which the manufacture of fireworks, other than sparklers, or in which processing involving fireworks, is carried on.
Fireworks plant-Lands with buildings thereon, used in connection with the manufacturing or processing of fireworks, as well as the storehouses for the storage of finished fireworks.
Fireworks storage building-A building in a fireworks plant used exclusively for the storage of finished or unfinished fireworks of less than 100 pounds.
Magazine-A box or building used exclusively for the storage of explosive raw materials used in the manufacture of fireworks or for the storage of finished or unfinished fireworks in excess of 100 pounds.
34 Pa. Code § 5.51