Requires cell towers to be equipped with a back-up power source in case of a power outage

This bill requires owners and operators of large outdoor cell towers (called "macro cell tower sites") in New York to install backup power systems capable of maintaining service for at least 72 hours during power outages. It applies to new installations and replacements of existing backup systems, but does not require updates to towers already equipped with backup power before the law takes effect. The backup systems must use renewable energy, fuel cells, or energy storage, excluding rooftop, small cell, or indoor antenna systems. The law takes effect 90 days after enactment.