Your bank guarantee should be sufficient to cover the construction cost of the area of the existing owners/members in the proposed building. If it meets this value, then you may consider it as sufficient/adequate.
One has to inquire with real estate brokers in his area to know prevailing rent and can also be ascertained by visiting few flats avavilable on rent in the near by area. Amount of the corpus will depend upon feasibility of the project and it is usually created to cover cost of maintenance of the new premises offered to the existing member.
The registration granted under section 5 may be extended by the Authority on an
application made by the promoter due to force majeure, in such form and on payment of such
fee as may be specified by regulations made by the Authority:
Provided that the Authority may in reasonable circumstances, without default on the
part of the promoter, based on the facts of each case, and for reasons to be...
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