(1) If a person has been insured under the legislation of both Contracting Parties, then—
(a) for the purpose of determining whether he is entitled to receive an old age pension under the legislation of one Party, any contribution paid by him or credited to him under the legislation of the other Party shall be treated as if it were a contribution, respectively, paid by him or credited to him under the legislation of the former Party; and
(b) if he is entitled to receive an old age pension under the legislation of the former Party, the rate of that pension shall be a part of the rate of the pension which would have been payable to him under that legislation if every contribution paid by him or credited to him under the legislation of the latter Party had been a contribution, respectively, paid by him or credited to him under the legislation of the former Party, namely, that part which bears the same relation to the whole as the number of contributions paid by him or credited to him under the legislation of the former Party bears to the total number of contributions paid by him or credited to him under the legislation of both Parties.
(2) For the purpose of applying the provisions of paragraph (1) of this Article—
(a) no account shall be taken of any graduated contributions paid under the legislation of the United Kingdom or of any graduated retirement benefit payable under that legislation, but any such benefit which is payable by virtue of such contributions shall be paid in addition to the old age pension which is calculated in accordance with those provisions;
(b) in those cases where, under the legislation of one (or the other) Party, the person concerned is—
(i) a woman claiming an old age pension by virtue of her husband's insurance; or
(ii) a woman whose husband's contributions are taken into account in determining her right to receive an old age pension by virtue of her own insurance, her marriage having been terminated by the death of her husband or otherwise;
any reference to a contribution paid by a person or credited to a person shall be construed, for the purpose of ascertaining her husband's yearly average of contributions, as including a reference to a contribution paid by her husband or credited to him;
(c) where a person has reached pensionable age, as prescribed in his case under the legislation of the United Kingdom, no account shall be taken under that legislation of any subsequent contributions which he pays under the legislation of Bermuda or has credited to him under that legislation.
(3) For the purpose of determining, in accordance with the provisions of paragraph (1) of this Article, whether a person is entitled to receive benefit under the legislation of Bermuda and for the purpose of determining, in accordance with those provisions, what benefit would have been payable under that legislation if every contribution paid by a person or credited to him under the legislation of the United Kingdom had been a contribution respectively paid by him or credited to him under the legislation of Bermuda, no account shall be taken of any contribution paid or credited under the legislation of the United Kingdom for any week before the week beginning on 5th August 1968.
(4) For the purpose of applying the provisions of sub-paragraph (b) of paragraph (1) of this Article, no account shall be taken of any contribution which a person has paid or had credited to him under the legislation of the United Kingdom if, in the calculation of the yearly average of contributions paid by him or credited to him under that legislation, no account is taken of that contribution.
(5) The provisions of the foregoing paragraphs of this Article shall not apply in relation to the legislation of one (or the other) Party in any case where a person qualifies for an old age pension under that legislation solely by virtue of contributions paid or credited under that legislation.