As used in parts 1 and 2, the following definitions apply: (1) "Postsecondary institution" means: (a) a unit of the Montana university system as defined in 20-25-201; (b) a Montana community college, defined and organized as provided in 20-15-101; or (c) an accredited tribal college located in the state of Montana. (2) "Resident student" means a person who was a resident of Montana prior to enrolling and who is attending a qualified postsecondary institution within Montana.