Requires local recreation departments, youth serving organizations, and youth camps to have defibrillators for youth athletic events.

S 3661 requires youth camps, municipal recreation departments, and nonprofit youth organizations (like Little Leagues, Pop Warner, and Police Athletic Leagues) to have an automated external defibrillator (AED) available on-site at all youth athletic events and practices held on public fields. Organizations must comply within 180 days of the law's effective date, or prove a certified emergency responder with an AED is present. The bill also provides legal immunity for organizations and their staff (including coaches and volunteers) when acquiring or using AEDs. This directly affects youth sports groups organizing events on public property across New Jersey, aiming to improve emergency response for cardiac incidents during athletic activities.