4. Qualified child increase.
(1) Section 77A (inserted by section 6 of the Social Welfare Act 2010) of the Principal Act is amended -
(a) by substituting the following subsection for subsection (2):
"(2) Subject to subsection (3), any increase of disablement pension payable under subsection (1) (b) in respect of a qualified child who normally resides with the beneficiary and with the spouse, civil partner or cohabitant of the beneficiary shall be payable at the rate of one-half of the appropriate amount in any case where the spouse, civil partner or cohabitant of the beneficiary is not a qualified adult and subsection (1) (b) shall be read and have effect accordingly.",
and
(b) by substituting the following subsection for subsection (3):
"(3) Subsection (2) shall not apply and no increase of disablement pension payable under subsection (1) (b) in respect of a qualified child who normally resides with the beneficiary and with the spouse, civil partner or cohabitant of the beneficiary shall be payable where the weekly income of that spouse, civil partner or cohabitant, calculated or estimated in the manner that may be prescribed, exceeds the amount that may be prescribed.".
(2) The Principal Act is amended -