As used in this part, the following definitions apply:
(1) "Eligible district" means a school district encompassing or adjacent to an Indian reservation or a school district that includes one or more schools with an Indian population of 10% or greater.
(2) "Immersion program" means a program of an eligible district in which:
(a) all participating students receive content area instruction in an Indian language at least 50% of the day;
(b) teachers are fully proficient in the languages they use for instruction; and
(c) the goal of the program is perpetuating cultural integrity and promoting bilingualism and biliteracy.
(3) "Indian language" means any of the languages of a federally recognized Indian tribe in Montana.