(1) Notwithstanding this Chapter and regulations made under this Chapter and subject to subsection (2), State pension (contributory) shall be payable in accordance with this section in the case of a person who -
(a) has attained pensionable age, and
(b) immediately before attaining pensionable age is in receipt of a payment under Chapter 16 of this Part.
(2) Only one pension shall be payable to or in respect of a person under this Chapter.
(3) In the case of a person who is in receipt of State pension (transition) under Chapter 16 of this Part, the weekly rate of pension payable shall be the greater of -
(a) the rate payable in accordance with this Chapter, or
(b) an amount equal to the rate of State pension (transition) payable in accordance with Chapter 16 of this Part.