4.—(1) Regulations may provide for circumstances in which a period of limited capability for work which is separated from another period of limited capability for work by not more than a prescribed length of time is to be treated for the purposes of this Part as a continuation of the earlier period.
(2) Regulations may provide, in relation to periods which are linked by virtue of regulations under sub-paragraph (1), that a condition which was satisfied in relation to the earlier period is to be treated for the purposes of this Part as satisfied in relation to the later period.