Virgin Galactic SpaceShipTwo
File photo of Virgin Galactic's SpaceShipTwo flies over the Mojave Desert shortly before successfully completing a test flight that broke the sound barrier Reuters

Richard Branson's space company, Virgin Galactic, has been granted an operating license to fly its passenger rocketship with the world's first paying space tourists aboard once final safety tests are completed, the Federal Aviation Administration said on Monday (August 1).

The unprecedented license covers all operations of Virgin Galactic's six-passenger, two-pilot SpaceShipTwo vehicle, including commercial passenger service, which according to FAA spokesman Hank Price is contingent on "certain terms and conditions" being met first.

Those requirements include verification of vehicle hardware and software "in an operational flight environment," the FAA wrote in an email.

The FAA, which oversees U.S. airline service and general aviation, is also the chief regulatory body for commercial spaceflight in the United States.

The new license will be modified as Virgin Galactic supplies the FAA with additional data from the SpaceShipTwo flight test program, company spokeswoman Christine Choi said in an email.

The company has not yet announced a date for the start of passenger flights but is selling tickets for a ride aboard SpaceShipTwo at $250,000 a seat. Commercial service is not expected to debut before 2017.

About 700 people have put down deposits for rides that will take them about 62 miles (100 km) above Earth, high enough to experience a few minutes of weightlessness and see the curvature of Earth set against the blackness of space.

Virgin Galactic's original SpaceShipTwo vehicle broke apart during an October 2014 test flight that killed the co-pilot and seriously injured the pilot, in an accident that was ultimately attributed to pilot error. Both were employees of Scaled Composites, a Northrop Grumman subsidiary based in Mojave, California, that built the vehicle.

The Spaceship Company, a Virgin Galactic sister firm also owned by Branson's London-based Virgin Group, built a new SpaceShipTwo, the second in a planned fleet of five, and took over the test flight program from Scaled.

The new ship, dubbed Unity, was rolled out of its hanger on Monday for its first taxi test at the Mojave Air and Space Port.

Virgin Galactic plans to fly from Spaceport America, near Las Cruces, New Mexico. SpaceShipTwo will be ferried to an altitude of about 50,000 feet (15,000 meters) by a carrier jet known as White Knight Two and then released for an independent rocket ride beyond the atmosphere.

SpaceShipTwo is designed to glide back to the ground and land on a runway like a conventional airplane.