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(ii) Requirements in force at the time of any substantial addition to the investment or change in the nature of the business based upon the investment, in respect of such addition or such change ; (iii) Reasonable measures to ensure participation under (iv) below, by the nationals of the Member in the future expansion of any branch of industry within its territories through increased investment; Provided that, if the nationals of other Members whose interests are materially affected believe that the measure taken is inconsistent with the provisions of this paragraph, the Member taking the measure will provide adequate opportunity for consultation with a view to reaching a satisfactory settlement with the affected nationals; (iv) Reasonable measures taken to ensure the transfer of ownership, in whole or in part, of any investment within its territories from the nationals of any other Member to its own nationals, it being understood that such measures will provide for the payment of just consideration for the ownership transferred and that if the nationals of any other Member believe such provision has not been made, the Member will provide adequate opportunity for consultation in the manner described in (iii) above. (b) Members shall make just compensation if the property, in which a national of another Member has an interest, is taken into public ownership or placed under public management or occupation. 3. Members shall promote co-operation between national and foreign enterprises or investors for the purpose of fostering economic development in cases where such co-operation appears to the Members concerned to be appropriate. Article 13 Governmental Assistance to Economic Development 1. The Members recognize that special governmental assistance may be required to promote the establishment, development or reconstruction of particular industries, or particular branches of agriculture, and that in appropriate circumstances the grant of such assistance in the form of protective measures is justified. At the same time they recognize that an unwise use of such measures would impose undue burdens on their own economies, unwarranted restrictions on international trade and might increase unnecessarily the difficulties of adjustment for the economies of other countries. 2. (a) If a Member in the interest of its programme of economic development or reconstruction considers it desirable to adopt any nondiscriminatory measure which would conflict with any provision of