5. If a person had elected under paragraph 4 of Schedule 4 to shorten the contribution period—
(a)he is in any case entitled to count as reckonable service
where
G is the original contribution period and H is so much of it as had elapsed by the effective date of the election; and
(b)paragraphs 3 and 4 have effect with the substitution—
(i)as A, of
(ii)as B, of the shortened contribution period;
(iii)as D, of the period from the effective date of the election to his 60th birthday; and
(c)the definition of C in paragraph 3(3) shall have effect with the substitution for the words “the contribution period” of the words “the shortened contribution period”.