Social Security Act 1973

4 In relation to employments which are or at any time have been recognised pensionable employments, and to the operation of schemes by reference to which such employments are or have been recognised, provision may be made by regulations—

(a) for treating an earner's employment, where it ends before a person succeeds to his employer's business, as having been employment under the employer's successor ;

(b) for disregarding changes in an earner's employment due to the death of an employer or other cause, or any cesser of recognised pensionable employment so due, or for treating employment under one employer as a variation of that under another and treating any recognition certificate issued to, or election made by, the former employer as issued to or made by the latter;

(c) for disregarding temporary interruptions in an earner's employment or recognised pensionable employment, and for treating the employment in either case as continuing during the interruption; and

(d) generally as to the circumstances in which an earner's employment is or is not to be treated as having begun, or as having come to an end ;

and references in this paragraph to an earner's employment beginning or ending shall include references to his employment becoming, or ceasing to be, recognised pensionable employment.