N.Y. Public Health Law § 3017
1. No ambulance service or advanced life support first response service shall respond to any call or request for emergency medical services within a town, village or fire district in Suffolk county that currently provides ambulance service or advanced life support services first response service, if the municipality has designated one or more ambulance services or advanced life support first response services to respond to such calls unless:
3. Every ambulance service or advanced life support first response service that operates in Suffolk county and has vehicles which travel through communities with designated ambulance service or advanced life support first response service shall require its drivers and emergency medical technicians: