Section 10 amends Article 75 of the Housing (Northern Ireland) Order 1992 to provide that, where a house is occupied by two or more qualifying persons and the Housing Executive believes they are not all members of the same family, the Executive may serve notice inviting evidence of a family relationship between the occupants to be provided. Where satisfactory documentary evidence is not forthcoming, the house will be treated as a house in multiple occupation and subjected to the regulatory regime which applies to such accommodation under Part 4 of that Act.