ARTICLE 15Retirement Pension and Widows' Benefit
(1) Subject to the provisions of paragraphs (2) to (4), where a person is entitled to a basic retirement pension under the legislation of any part of either Party otherwise than by virtue of this Convention, that pension shall be payable and Article 16 shall not apply under that legislation.
(2) Notwithstanding paragraph (1), a person entitled to a Category B retirement pension under the legislation of Great Britain, Northern Ireland or the Isle of Man, shall also be entitled to have any Category A retirement pension entitlement calculated in accordance with Article 16.
(3) Notwithstanding paragraph (1), a person entitled to a Category B retirement pension under the legislation of Jersey or Guernsey shall also be entitled to have any Category A retirement pension entitlement calculated in accordance with Article 16. Such a person shall be entitled to receive only the benefit of her choice.
(4) Entitlement to a retirement pension in the circumstances referred to in paragraph (1) shall not preclude the competent authority of any part of either Party from taking into account in accordance with paragraph (3) of Article 16 insurance periods completed under the legislation of any part of either Party.