For the purposes of section one hundred and four of the Education Act, 1944, in this Act referred to as " the principal Act" (which empowers the Minister, where he directs that a school proposed to be established shall be an aided school of a special agreement school and is satisfied that the establishment of the school is due to the need to provide education for a substantial number of displaced pupils, to pay to the managers or governors of the school a grant not exceeding one half of so much of the amount expended in constructing the school as is in his opinion attributable to the provision of education for such pupils), the expression " displaced pupils " shall, in relation to a proposed school, include pupils who, in consequence of action taken or proposed to be taken under the enactments relating to housing or to town and country planning, have ceased to reside in the area served by some other aided school or special agreement school, being—
(a)pupils for whom education was being provided in that other school immediately before they ceased to reside in the area served by it; or
(b)pupils, other than as aforesaid, for whom education would, in the opinion of the Minister, have been provided in that other school had they continued to reside in the area served by it.