In this subchapter the following terms have the meanings indicated below and are supplemental to the definitions in 75-5-103, MCA:
(1) "Applicant" means a person who applies for a license or permit issued by an agency of the federal government to conduct an activity that may result in discharge into state waters.
(2) "Licensing or permitting agency" means an agency of the federal government to which application is made for a license or permit to conduct an activity which may result in a discharge into state waters.
(3) "Regional administrator" means the administrator of Region VIII of the US environmental protection agency.
(4) "Discharge" means the injection, deposit, dumping, spilling, leaking, placing, or failure to remove, of any pollutant so that it or any constituent of the pollutant may enter into state waters.