DT: Sudan: double taxation agreement, Article 29: Entry into force
(1) This Convention shall be ratified and the instruments of ratification shall be exchanged at Khartoum as soon as possible.
(2) This Convention shall enter into force after the expiration of thirty days following the date on which the instruments of ratification are exchanged (a) and shall thereupon have effect:
(a) in the United Kingdom:
(i) as respects income tax and capital gains tax, for any year of assessment beginning on or after 6 April 1975; and
(ii) as respects corporation tax, for any financial year beginning on or after 1 April 1975;
(b) in the Sudan: as respects income tax and capital gains tax for any year of assessment beginning on or after 1 January 1975.