N.J. Stat. 2A:53A-12
Liability: Volunteer First Aid
A member of a volunteer first aid organization, rescue or emergency squad, or National Ski Patrol System who, in good faith, provides first aid will not be held legally responsible for acting or for failing to act. They can be held legally responsible if operating a motor vehicle or acts with extreme carelessness or intent to cause harm.
Members of volunteer first aid, rescue or emergency squads or national ski patrol system; liability for damages
No member of a volunteer first aid, rescue or emergency squad, or volunteer member of the National Ski Patrol System, which provides emergency public first aid and rescue services shall be liable in any civil action to respond in damages as a result of his acts of commission or omission arising out of and in the course of his rendering in good faith any such services as such member but such immunity from liability shall not extend to the operation of any motor vehicle in connection with such services. Nothing herein shall be deemed to grant any such immunity to any person causing damage by his willful or wanton act of commission or omission.