Federal air-safety regulators for the first time proposed allowing small drones to routinely fly over crowds of people and at night, long-awaited steps toward opening up more airspace and commercial opportunities for unmanned aircraft.

The preliminary rules, released Monday by the Federal Aviation Administration, call for enhanced training of ground operators and installation of anti-collision lights. The draft document also breaks new regulatory ground by creating separate categories of drones based on weight and other criteria, and then seeks to impose different levels of safeguards to prevent injuries in the event of a crash. Read more…