(vii) To refrain from providing training for members of the South African armed forces; (viii) To refrain from any joint military exercises with South Africa; (ix) To prohibit warships or military aircraft from visit­ ing South African ports and airports, and South African warships or military aircraft from visiting their territories; (x) To prohibit visits of military personnel to South Africa and visits by South African military person­ nel to their countries; (xi) To refrain from exchanges of military, naval or air attachés with South Africa; (xii) To refrain from purchasing any military supplies manufactured by, or in collaboration with, South Africa; (xiii) To refrain from any communications or contacts with the South African military establishment or installations; (xiv) To refrain from any other form of military co­ operation with South Africa; (xv) To prohibit any violations of the arms embargo by corporations, institutions or individuals within their jurisdiction; (xvi) To refrain from any collaboration with South Africa in the nuclear field; (xvii) To prohibit any institutions, agencies or companies, within their national jurisdiction, from delivering to South Africa or placing at its disposal any equip­ ment or fissionable material or technology that will enable the racist régime of South Africa to acquire nuclear-weapon technology; C. Economic collaboration (c) To terminate all economic collaboration with South Africa and, in particular: (i) To refrain from supplying petroleum, petroleum prod­ ucts or other strategic materials to South Africa; (ii) To refrain from extending loans, investments and technical assistance to the racist régime of South Africa and companies registered in South Africa; (iii) To prohibit loans by banks or other financial institu­ tions in their countries to the racist régime of South Africa or South African companies; (iv) To prohibit economic and financial interests under their national jurisdiction from co-operating with the 