There are good grounds for including in a convention for the avoidance of double taxation provisions concerning co-operation between the tax administrations of the two Contracting States. In the first place it appears to be desirable to give administrative assistance for the purpose of ascertaining facts in relation to which the rules of the convention are to be applied. Moreover, in view of the increasing internationalisation of economic relations, the Contracting States have a growing interest in the reciprocal supply of information on the basis of which domestic taxation laws have to be administered, even if there is no question of the application of any particular article of the Convention.