Each branch of the military has different limitations for shipping a POV. The limitations for the Army, Air Force, Marines and Navy are:
Army and Air Force personnel POVs will be accepted for shipment if delivered to the port within 90 days after the service member departed for an overseas tour of more than one year, or within 30 days after the service member's departure on a tour of duty of one year or less.
Navy and Marine Corps personnel POVs will be accepted when at least 12 months remain to be served at their current overseas duty station at the time vehicle is delivered to the loading port.
Please consult your local Personal Property Officer for detailed information when you are planning to ship your POV.