4. Section 4 of the Principal Act is amended by inserting in subsection (1) the following definitions: “ ‘child'—
(a) means a person who has not attained the age of 18 years; and
(b) in relation to a person, includes a child—
(i) who normally or regularly resides with the person; or
(ii) of whom the person is a guardian;
(a) an offence against a provision of this Act specified in column 1 of Schedule 2 or an attempt to commit such an offence;
(b) an offence against section 27 of the Domestic Violence Act 1986 ; or
(c) an offence against section 129 of the Motor Traffic Act 1936 ;
committed by a person so as to cause physical or emotional harm to—
(d) a spouse of the person;
(e) a child of the person or of a spouse of the person;
(f) a relative; or
(g) a household member;
(a) means—
(i) the father, mother, grandfather, grandmother, step-father, step-mother, father-in-law or mother-in-law of the person;
(ii) the son, daughter, grandson, granddaughter, step-son, step-daughter, son-in-law or daughter-in-law of the person;
(iii) the brother, sister, half-brother, half-sister, step-brother, step-sister, brother-in-law or sister-in-law of the person;
(iv) the uncle, aunt, uncle-in-law or aunt-in-law of the person;
(v) the nephew or niece of the person; or
(vi) the cousin of the person;
(b) includes a person who would have been a relative of a kind referred to in paragraph (a) if the first-mentioned person had been legally married to his or her de facto spouse; and
(c) includes a former relative of a kind referred to in paragraph (a) or (b);