Listing application requires enclosing the letter precedent and mandates simultaneous listing across concerned exchanges unless authority permits. Applicants may apply to the exchange(s) only after receiving a letter precedent to listing, enclosing a copy; exchanges must process the application under the Securities Contracts (Regulation) Act framework and their rules and byelaws. Unless the Authority permits otherwise, securities for which a letter precedent has been granted must be listed on the same day at all concerned exchanges.