Revise definition of "dependent child" in highway patrol, police, and firefighter retirement systems

This bill updates the definition of "dependent child" for retired highway patrol officers, police officers, and firefighters in Montana, affecting their retirement and survivor benefits. Under the new rules, a dependent child is an unmarried child under 18, or an unmarried child under 24 who is a full-time student at an accredited school working toward a certificate or degree. The changes apply to three specific retirement systems and clarify eligibility for survivor benefits when a retiree passes away.