The Federal Aviation Administration has issued an experimental airworthiness certificate to an Amazon Logistics, Inc. UAS design that Amazon will use for research and development and crew training. Amazon says it wants to use drones for the delivery of packages.
The FAA typically issues experimental certificates to manufacturers and technology developers to operate a UAS that does not have a type certificate.
Under the provisions of the certificate, all flight operations must be conducted within the limits of 400 feet during daylight hours in visual meteorological conditions. The UAS must always remain within visual line-of-sight of the pilot and observer. The pilot flying the UAS must have at least a private pilot’s certificate and current medical certification.
More information are available here.