As used in this act:

  (a) “Apples” means all varieties of apples.

  (b) “Controlled atmosphere storage” means the storage of fruits or vegetables in an approved sealed storage room or in an approved sealed storage building, or in a sealed storage space within the room or building, under controlled conditions of time in days, oxygen content, carbon dioxide content, and temperature as established by this act or rules adopted under this act. The term controlled atmosphere may be referred to by the initials “CA” or similar terms or abbreviations.

  (c) “Director” means the director of the Michigan department of agriculture or his or her designated agents.

  (d) “Sealed storage room”, “sealed storage space”, or “sealed storage building” means sealed storage spaces in which controlled atmosphere is maintained, inferred, advertised, or represented as having a controlled atmosphere.