Following the FAA's recent relaxation of commercial drone flight regulations, Amazon is forging ahead with plans to employ the machines for deliveries. But first, the company has proposed some ground rules to keep the fledgling industry flying safely and out of the way of manned aircraft. Currently the FAA only allows drones to climb to 400 feet and they must remain within the pilot's line of sight. They also cannot be operated within five miles of an airport. Amazon's proposal builds off these initial restrictions with faster, long-range drones flying between 200 and 400 feet up. Slower and short-range drones would operate below 200 feet.