(1) Section 227 (amended by section 22 of the Social Welfare and Pensions Act 2010) of the Principal Act is amended -

(a) by designating the section as subsection (1),

(b) in subsection (1) -

(i) by substituting the following definition for the definition of "child":

"'child' means a qualified child as defined in section 2(3)(b) for the purposes of section 228;",

and

(ii) by deleting the definition of "family",

and

(c) by inserting the following subsections after subsection (1):

"(2) For the purposes of this Part, 'family' means, subject to subsections (3) and (4), a household which contains -

(a) a person who is engaged in remunerative full-time employment as an employee, and

(b) at least one child who is normally a member of the same household as that person.

(3) Notwithstanding subsection (2), where a person referred to in paragraph (a) of that subsection is living with -

(a) his or her spouse, civil partner or cohabitant, and

(b) there is at least one child who is normally a member of the household,