For the purpose of implementing Community obligations the Commissioners shall co-operate with other customs services on matters of mutual concern, and (without prejudice to the foregoing) may for that purpose—
(a)give effect, in accordance with such arrangements as they may direct or by regulations prescribe, to any Community requirement or practice as to the movement of goods between countries, including any rules requiring payment to be made in connection with the exportation of goods to compensate for any relief from customs duty allowed or to be allowed (and may recover any such payment as if it were an amount of customs duty unpaid); and
(b)give effect to any reciprocal arrangements made between member States (with or without other countries or territories) for securing, by the exchange of information or otherwise, the due administration of their customs laws and the prevention or detection of fraud or evasion.