As used in this part unless the context otherwise requires:

(1) [Deleted by 2021 amendment.]
(2) “Commissioner” means the commissioner of environment and conservation, the commissioner of environment and conservation’s duly authorized representatives, and in the event of absence or a vacancy in the office of commissioner, the deputy commissioner; and
(3) “Department” means the department of environment and conservation.
(4) [Deleted by 2021 amendment.]