If a company fails to receive the minimum amount of subscription for the securities issued, it has to refund the application money within how many days of closure of issue?

Section 39 – Allotment of Securities by company No allotment of any  securities  of a company offered to the public for subscription shall be made unless: ·         the amount stated in the  prospectus  as the minimum amount has been subscribed and ·         the sums payable on application for the amount so stated have been paid to and received by the company by cheque or other instrument. If the stated minimum amount has not been subscribed and the sum payable on application is  not received within a period of thirty days  from the date of issue of the prospectus, or such other period as may be specified by SEBI, then the  application money shall be repaid within a period of fifteen days from the closure of the issue  and if any such money is not so repaid within such period, the directors of the company who are officers in default shall jointly and severally be liable to repay that money with interest at the rate of 15% per annum. The application money to be refunded shall be credited only to the bank account from which the subscription was remitted.