Establish a behavioral health trust fund

This bill creates the Montana Behavioral Health Trust Fund to provide dedicated funding for mental health and substance use services. It establishes a seven-member board (appointed by the governor, legislative leaders, and tribal representatives) to manage the fund, which receives quarterly interest from a permanent endowment (preserving the principal). Funds will support specific services like school-based mental health programs, crisis care, counselors in homeless shelters, transitional housing, and facility expansions - directly benefiting community organizations and public health services. The bill mandates that funds cannot replace existing state funding and requires the board to develop a state plan and monitor program effectiveness.