Development and expansion schemes

(1) The trust may, for the purpose of development of any locality within the municipal limits contained in its local area, prepare "a development scheme", and (2) Such trust may, if it is of opinion that it is expedient and for the public advantage to promote and control the development of and to provide for the expansion of a municipality in any locality adjacent thereto, within the local area of such trust prepare "an expansion scheme". (3) "A development scheme" or "an expansion scheme" may provide for the lay- out of the locality to be developed, the purposes for which particular portions of such locality are to be utilised, the prescribed street alignment and the building line on each side of the streets proposed in such locality, the drainage of insanitary localities and such other details as may appear desirable.