(1) The Principal Act is amended -

(a) in section 216A(3A) by substituting "a child of the individual or of the civil partner of the individual" for "a child of the individual",

(b) in section 286A(3) by substituting "on the death of his or her spouse or civil partner, and that spouse or civil partner" for "on the death of his or her spouse, and that spouse",

(c) in section 462(2)(b) by substituting "in the case of civil partners who are not living separately" for "in the case of civil partners where they are not living separately and apart",

(d) in section 604(11) by substituting the following for paragraph (a):

"(a) In this subsection 'dependent relative', in relation to an individual, means a relative of the individual, or of the wife or husband of the individual, who is incapacitated by old age or infirmity from maintaining himself or herself, or a person, whether or not he or she is so incapacitated, and -

(i) who is the widowed father or widowed mother of the individual or of the wife or husband of the individual, or