(1) Section 109 of the Principal Act is amended -
(a) by inserting the following subsection after subsection (1):
"(1A) In the case of a person who attained pensionable age before 6 April 2002, subsection (1) shall be read as if the following condition were substituted for the condition in paragraph (b):
'(b) that the claimant has qualifying contributions in respect of not less than 156 contribution weeks since his or her entry into insurance,'.",
and
(b) by substituting the following subsection for subsection (2):
"(2) In the case of a person, other than a person who on or before 6 April 1997 is a voluntary contributor paying contributions under Chapter 4 of Part 2, who attained pensionable age on or after 6 April 2002, but before 6 April 2012, subsection (1) shall be read as if the following condition were substituted for the condition in paragraph (b):
'(b) that the claimant has qualifying contributions in respect of not less than 260 contribution weeks since his or her entry into i
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