Generally revise child custody laws

SB 318 revises Montana's child custody laws to prioritize child safety in custody cases. It mandates that judges, standing masters, and guardians ad litem receive trauma-informed training on domestic violence, child abuse (including physical, sexual, and emotional abuse), and victim-perpetrator dynamics - requiring 20 hours of initial training and 15 hours every two years. The bill requires courts to consider domestic violence and child abuse allegations using valid evidence and strengthens protections for children by updating definitions and procedures in custody proceedings. These changes directly affect court personnel handling custody cases across Montana, aiming to improve how courts address abuse and ensure child safety. The bill also updates related statutes (e.g., Sections 3-1-1501, 40-4-205, MCA) to align with these new requirements.