Requires public utility to charge volunteer emergency service organization residential rate.

S 1604 requires public utilities in New Jersey to charge volunteer emergency service organizations (like fire departments, ambulance squads, and rescue teams) the residential electricity or gas rate - instead of a higher commercial rate - for service at their primary operating location, if the residential rate is lower. It defines these organizations as those relying on volunteers for emergency services and mandates utilities to create a simple certification process (with the Board of Public Utilities) for organizations to qualify. The bill applies directly to volunteer emergency groups and their utility providers, ensuring cost savings when residential rates are cheaper. The law takes effect immediately upon enactment.