(1) The moneys so, borrowed and the rents and profits of the said land, after providing for the interest and sinking fund (if any) on the moneys so borrowed, shall be applied in the acquisition by purchase or lease by the Board of a site for a public school or schools and technical school, in substitution for the schools erected on the land described in the Schedule hereto, and for offices for the use of the Board, and in the erection and equipment of such schools and offices:
Provided that all such expenditure shall be previously approved by the Minister of Education.
(2) Subject to the foregoing provision, such moneys shall be used solely for the purchase or lease of sites for other public schools, or school residences, or technical schools in the Education District of Wanganui.