13. In the case of–
(a)an officer to whom regulation 6(2)(a)(v) applies, who is in receipt of an ill-health pension under regulation B3 of the 1987 Regulations; or
(b)an officer to whom regulation 6(2)(a)(v) applies who is in receipt of a deferred pension under regulation B5 of the 1987 Regulations,
and who, in either case, has on or after 6th April 2006 rejoined that officer’s force or joined another force (otherwise than in the circumstances set out in regulation 6(2)(c)(i), (ii) or (iii)), regulation 51 shall apply in relation to that officer’s ill-health pension as if it were a standard ill health pension under regulation 29 or in relation to that officer’s deferred pension as if it were a deferred pension which came into payment early on the ground of permanent disablement for engaging in any regular employment under regulation 32 (as the case may be); and if a portion of that officer’s pension was commuted for a lump sum under regulation B7 of the 1987 Regulations, the proviso to regulation 28(1)(b) and regulation 28(2) shall have effect as if references to the previous lump-sum payment (in the proviso to regulation 28(1)(b)) and to the most recent lump sum payment (in regulation 28(2)) included references to the lump sum paid by way of commutation.