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The Contracting States undertake to observe strictly the principle of equitable treatment in respect of Customs or other similar regulations or procedure, formalities of the grant of licences, methods of verification or analysis, and all other matters dealt with in the present Convention, and consequently agree to abstain, in these matters, from any unjust discrimination against the commerce of any Contracting State.
The above principle shall be invariably applied even in cases in which certain Contracting States, in accordance with their legislation or commercial agreements, may reciprocally agree to accord still greater facilities than those resulting from the present Convention.