Revise offense of endangering the welfare of children

SB 164 amends Montana's endangering the welfare of children law to prohibit specific medical treatments for children under 16. The bill bans surgical procedures, puberty blockers, and hormone therapies (like estrogen or testosterone) when used to alter a child's appearance or affirm a gender identity inconsistent with their biological sex. Violating this prohibition is classified as a felony, carrying up to five years in prison and a $10,000 fine, with harsher penalties if the child suffers serious injury. The law would take effect on January 1, 2026, directly affecting medical providers, caregivers, and children under 16 who might receive these treatments.