Section 18(7)(v) in The Companies (Share Capital and Debentures) Rules, 2014
(v)In case a company is covered in item (A) or item (B) of sub-clause (iii) of clause (b) or item (B) of sub-clause (iv) of clause (b), it shall on or before the 30th day of April in each year, in respect of debentures issued by a company covered in item (A) or item (B) of sub-clause (iii) of clause (b) or item (B) of sub-clause (iv) of clause (b), invest or deposit, as the case may be, a sum which shall not be less than fifteen per cent., of the amount of its debentures maturing during the year, ending on the 31st day of March of the next year in any one or more methods of investments or deposits as provided in sub-clause (vi):