The Child Support(Northern Ireland) Order 1991

8.  Where regulations under this Schedule require a child support officer to take account of the housing costs of any person in calculating, or estimating, his assessable income or disposable income, those regulations may make provision—

(a) as to the costs which are to be treated as housing costs for the purpose of the regulations;

(b) for the apportionment of housing costs; and

(c) for the amount of housing costs to be taken into account for prescribed purposes not to exceed such amount (if any) as may be prescribed by, or determined in accordance with, the regulations.