5.(1) Notwithstanding anything contained in any law for the time being in force or in any disposition, whether testamentary or otherwise, by a subscriber to, or depositor in, a Government or Railway Provident Fund of the sum standing to his credit in the fund, or of any part thereof, where any nomination duly made in accordance with the rules of the Fund, purports to confer upon any person the right to receive the whole or any part of such sum on the death of the subscriber or depositor occurring before the sum has become payable or before the sum. having become payable, been paid, the said person shall on the death as aforesaid of the subscriber of depositor, become entitled, to the exclusion of all other persons, to receive such sum or part thereof, as case may be, unless - (a) such nomination is at any time varied by another nomination made in like manner or expressly cancelled by notice given in the manner and to the authority prescribed by those rules, or (b) such nomination at any time becomes invalid by reason of the happening of some contingency specified therein, - and if the said person predeceases the subscriber or depositor, the nomination shall, so far as it relates to the right conferred upon the said person, become void and of no effect: Provided that where provision has been duly made in the nomination in accordance with the rules of the fund, conferring upon some other person such right in the stead of the person deceased, such right shall, upon the decease as aforesaid of the said person, pass to such other person. (2) Notwithstanding anything contained in the ¹[Succession Act, 1925], any person, who becomes entitled as aforesaid, may be granted a certificate under that Act ²[* * *] entitling him to receive payment of such or part, and such certificate shall not be deemed to be invalidated or superseded by any grant to any other of person of probate or letters of administration to the estate of the deceased. (3) The provisions of this section as amended by sub-section (1) of section 2 of the Provident funds (Amendment) Act, 1946, shall apply also to all such nominations made before the date of the commencement of that Act: Provided that the provisions of this section as so amended shall not operate to affect any case, in which before the said date any sum has paid, or has under the rules of the Fund become payable in pursuance of any nomination duly made in accordance with those rules.