31Moreover, the customs union necessarily implies that the free movement of goods between Member States should be ensured. That freedom could not itself be complete if it were possible for the Member States to impede or interfere in any way with the movement of goods in transit. It is therefore necessary, as a consequence of the customs union and in the mutual interest of the Member States, to acknowledge the existence of a general principle of freedom of transit of goods within the Community (SIOT, paragraph 16).
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