There are guidelines set in place to meet vehicle transport.  So, your vehicle should be operable and safe.  Your vehicle must to be checked, prior to shipment, for any leaking fluids to avoid repercussions, because you may be responsible for damage.  The height of your vehicle must be less than seven feet.  If it is higher than 7 feet you must contact your local shipping company. 

A vehicle is required to have a minimum of 4 inches of the ground clearance to safely load and unload.  Also, your gas tank should be less than ¼ tank full of gas.  You are also responsible for preparation for fluids such as coolant and transmission fluids.  Also, you will be asked to sign the bill of lading and the condition report at both the origin and destination.