# The Social Security (Widow's Benefit and Retirement Pensions) Regulations 1979, Paragraph 1


In this Schedule—
(a) A is the number of the former spouse's or former civil partner's qualifying years up to (exclusive) the year in which the marriage or, as the case may be, the civil partnership terminated but where Part 1 of the Pensions Act 2014 applies to the former spouse or former civil partner, A is the number of his qualifying years up to the year ending on 5th April 2016 (inclusive);
(b) B is the number of years in the former spouse's or former civil partner's working life up to (exclusive) the year in which the marriage or, as the case may be, the civil partnership terminated ; and
(c) “qualifying year” means a year for which the former spouse’s or former civil partner’s earnings factor is sufficient to satisfy—
(i) paragraph 5(3)(b); or
(ii) paragraph 5A(2)(b),
of Schedule 3 to the Social Security Contributions and Benefits Act 1992 and does not include a year which is treated as such a year by virtue of regulation 8(4).

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Source: https://www.legislation.gov.uk/uksi/1979/642/schedule/1/paragraph/1 (the official version)
Page: https://openlegislation.uk/social-security-widows-benefit-and-retirement-pensions-regulations-1979/schedule-1/paragraph-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.