(1)This section has effect where, apart from section 43(1) above, a married woman would be entitled both—
(a)to a Category A retirement pension; and
(b)to a Category B retirement pension by virtue of the contributions of her husband.
(2)If by reason of a deficiency of contributions the basic pension in the Category A retirement pension falls short of the weekly rate specified in Schedule 4, Part I, paragraph 5, that basic pension shall be increased by the lesser of—
(a)the amount of the shortfall, or
(b)the amount of the weekly rate of the Category B retirement pension.
(3)This section does not apply in any case where both the husband and wife attained pensionable age before 6th April 1979.