Revise school isolation laws and funding of nonisolated schools

This bill revises Montana's school funding rules for nonisolated schools with low enrollment. It requires school districts operating high schools with fewer than 25 average annual students (ANB) for two consecutive years - without isolated school status - to cover half of the school's direct state aid, mirroring the current requirement for small elementary schools. Previously, high schools under this threshold had different funding arrangements. The change applies specifically to districts with nonisolated high schools meeting the enrollment criteria, shifting half the state aid cost from state/county to local property taxes. The law takes effect July 1, 2025.