The school shall admit students in accordance with criteria, standards, and the procedures established by the board. To be eligible to be considered for admission, an applicant must be a legal resident of this State. Eligibility to remain enrolled in the school terminates when a student becomes a nonresident of this State. The board shall ensure, insofar as possible without jeopardizing admission standards, that an equal number of students are admitted from each of the state’s congressional districts.