Promoters' contribution requirement: promoters must hold minimum post-issue stake, with limited shortfall permitted to specified investors. The regulation requires promoters to hold twenty per cent of post-issue expanded capital, by equity or subscription to convertible securities, with specified institutional or qualifying non-individual investors allowed to cover a limited shortfall without being identified as promoters. Conversion-linked equity must observe pre-determined pricing and not be below the weighted average price when conversions occur on different dates. Promoters must satisfy the contribution at least one day prior to opening; promoter funds intended for contribution must be held in escrow and disclosed if already utilised.