5.—(1) In these Regulations, “non-dependant” means any person, except someone to whom paragraph (2) applies, who normally resides with a relevant person or with whom a relevant person normally resides.
(2) This paragraph applies to—
(a)any members of the relevant person’s family;
(b)if the relevant person is polygamously married, any partner of his and any child or young person who is a member of his household and for whom he or one of his partners is responsible;
(c)a child or young person who is living with the relevant person but who is not a member of his household by virtue of regulation 8 (membership of the same household);
(d)subject to paragraph (3), a person who jointly occupies the relevant person’s dwelling and is either a co-owner of that dwelling with the relevant person or his partner (whether or not there are other co-owners) or is liable with the relevant person or his partner to make payments in respect of his occupation of the dwelling;
(e)subject to paragraph (3)—
(i)any person who is liable to make payments on a commercial basis to the relevant person or the relevant person’s partner in respect of the occupation of the dwelling;
(ii)any person to whom or to whose partner the relevant person or the relevant person’s partner is liable to make payments on a commercial basis in respect of the occupation of the dwelling; or
(iii)any other member of the household of the person to whom or to whose partner the relevant person or the relevant person’s partner is liable to make payments on a commercial basis in respect of the occupation of the dwelling.
(f)a person who lives with the relevant person in order to care for him or a partner of his and who is engaged by a charitable or voluntary organisation (other than a Health and Social Services Board) which makes a charge to the relevant person or his partner for the services provided by that person.
(3) Excepting persons to whom paragraph 2(a) to (c) and (f) refers, a person shall be a non-dependant if he resides with a relevant person to whom he is liable to make payments in respect of the dwelling and either—
(a)that the relevant person is a close relative of him or his partner, or
(b)the tenancy or other agreement between them is other than on a commercial basis.
(4) For the purposes of this regulation—
(a)a person resides with another only if they share any accommodation but not if that accommodation is a bathroom, a lavatory or a communal area or any combination of them and not if each person is separately liable to make payments in respect of his occupation of the dwelling to the landlord;
(b)“communal area” means an area, other than a room or rooms, of common access (including halls and passageways).