Adds to existing law to prohibit a person from entering a restroom or changing room of the opposite sex, to provide a penalty, and to provide exceptions.

This bill adds Section 18-4117 to Title 18, Idaho Code, making it a misdemeanor for any person to knowingly and willfully enters a rest room, changing room, locker room, or shower room in a government-owned building or place of public accommodation designated for the opposite biological sex. A second or subsequent conviction within five years is a felony punishable by up to five years in state prison. Defined as a facility where undress occurs in the presence of others, the prohibition includes exceptions for custodial/maintenance, medical/law enforcement assistance, emergencies, single-user facilities (when no same-sex option exists), temporary re-designations, athletic coaching, and accompaniment of family, guardians, or designees in need (provided the designee is not of the designated sex).