The produce and manufactures of the dominions and possessions of Her Britannic Majesty which may be imported into the Zollverein, and the produce and manufactures of the States of the Zollverein which may be imported into the United Kingdom of Great Britain and Ireland, whether intended for consumption, warehousing, re-exportation, or transit, shall therein be treated in the same manner as, and in particular shall be subject to no higher or other duties than, the produce and manufactures of any third country the most favoured in those respects.