22. (1) Subject to the other provisions of this Ordinance and the rules made thereunder, the Authority may adopt such measures and exercise such powers as may be necessary for carrying out the purposes of this Ordinance. (2) Without prejudice to the generality of the foregoing power, the Authority may- (a) enter into and perform all such contracts as it may consider necessary; (b) cause studies, surveys, experiments and technical researches to be made or contribute towards the cost of any such studies, surveys, experiments or technical researches made by any other person or agency at the request of the Authority; (c) issue interim development orders for areas for which a development scheme is under preparation and restrict or prohibit, by general or special order, any use or change in the use of land and any alteration in buildings, structures and installations: Provided that no order of restriction or prohibition under this clause shall be made for such period, not exceeding twelve months, as may be specified in the order; (d) seek and obtain advice and assistance for the preparation of any plan or development scheme or for the execution of any scheme from any local authority or Government organisation or institution, and the expenditure, if any, involved in giving such advice or assistance shall be borne by the Authority; (e) co-ordinate the execution of development schemes; and (f) finance and supervise the execution of any development scheme.