Direct transport requirement limits preferential origin; transit through non-Party territories allowed only under strict preservation and customs control. Preferential origin requires products to be transported directly between the Parties, with an exception for transit through non-Parties only where goods undergo no operations beyond unloading, reloading or preservation, remain under customs control, and do not enter trade or consumption; failure to meet these conditions means the product is not originating. An importer must supply appropriate evidence to customs on request to demonstrate compliance with these transit or temporary storage conditions.