As Drone Rules Near, More Debate Looms

When the Federal Aviation Administration perhaps early this week unveils its first rules permitting businesses to fly drones for limited uses, the move is likely to spark broader demands for loosening restrictions on unmanned aircraft.

In recent days, agency officials have said the announcement—allowing drones weighing roughly 50 pounds to fly at low altitudes only in daylight and within sight of operators—is imminent. Some industry...