(a) it is satisfied that the law of that country contains provisions which correspond substan tially to the relevant provisions of section three; or (b) the President has, by proclamation in a statutory instrument, declared that the laws of that country contain provisions which correspond substantially to the relevant provisions of section three. (2) No proclamation shall be issued in terms of paragraph (b) of subsection (1) unless the President is satisfied that adequate provision is made under the law of the country concerned for the recognition by the courts of that country of the decrees and orders made under section three in any case in which the husband is not domiciled in Zimbabwe. (3) The President may at any time revoke any proclamation issued in terms of paragraph (b) of subsection (1). 13 Grounds for decree of nullity (1) In addition to any other ground on which a marriage is by law voidable, a marriage shall be void able on the ground— (a) that the marriage has not been consummated owing to the wilful refusal of the defendant to consummate the marriage; or (b) that either party to the marriage was at the time of the marriage mentally disordered or defective within the meaning of the Mental Health Act [Chapter 15:06]: Provided that, in the case specified in paragraph (b ), an appropriate court shall not grant a decree of nullity unless it is satisfied that — (i) the plaintiff was at the time of the marriage ignorant of the facts alleged; and (ii) the proceedings were instituted within a year from the date of marriage; and (iii) marital intercourse with the consent of the plaintiff has not taken place since the discovery by the plaintiff of the existence of the ground for a decree. (2) Nothing in subsection (1) shall be construed as validating any marriage which is by law void, but with respect to which a decree of nullity has not been granted. 14 L e g i t i m a c y of children of voidable marriages Where a decree of nullity is granted in respect of a voidable marriage, any child who would have been the legitimate child of the parties to the marriage if it had been dissolved instead of being annulled, at the date of the decree, shall be deemed to be their legitimate child notwithstanding the annulment. 15 Evidence (1) Notwithstanding any rule of law, the evidence of a husband or wife shall be admissible in any proceedings to prove that marital intercourse did or did not take place between them during any period. (2) Notwithstanding anything in subsection (1) or any rule of law, a husband or wife shall not be compellable to give evidence of the matters mentioned in that subsection. 5