MA H1752

Prohibits leaving a child under age 3 unattended (alone or with only someone under age 13) in a motor vehicle where exposure to extreme heat or cold could threaten the child's health

Authorizes law enforcement officers and firefighters to enter vehicles by any reasonable means to rescue unattended children, with immunity from criminal and civil liability

Allows private citizens to forcibly enter a locked vehicle to rescue a child in immediate danger if they first call 911, use only reasonable force, have good faith belief of imminent harm, and remain with the child until responders arrive; provides liability immunity for such rescuers

Civil fines for violations escalate from $150 (first offense) to $300 (second offense) to $500 (third or subsequent offense)

Creates a criminal offense for negligently leaving a child in a vehicle that causes serious bodily injury, punishable by up to 10 years in state prison or 2½ years in house of correction