Here’s what SXGP.com had to say about it.

“Shipping arrangements for the December 7 & 14 events will be handled by Entertainment Logistics, a company with extensive experience in handling the shipment of such products throughout the world. All motorcycles and related equipment will be shipped by air and will be insured for damage or loss while in transit. Motorcycles that are shipped to the European events will be returned to the U.S. immediately following the December 14th event."

THQ World Supercross GP is a 17-round global series that is produced and promoted by Clear Channel Entertainment. There will be a world champion crowned based upon the points earned in the 17 events. Riders must compete in the international rounds to be eligible to win the world championship. The 17-event THQ World Supercross GP is comprised of the two international rounds and 15 of the 16 events that are included within the AMA
Supercross Series.