The Housing Subsidy Order (Northern Ireland) 1947
"(e) the said person has been brought to a district wherein he is in need of housing accommodation and the Ministry of Commerce, for Northern Ireland has certified him to be a person engaged in work calculated to promote employment in Northern Ireland.".

3. Regulation two of the principal Regulations (which relates to the maximum and minimum numbers of persons who may be permitted to occupy housing accommodation to which the principal Regulations apply) shall not apply to any housing accommo...