Why do the shareholders have to wait till the expiry of the validity period of the original warrant? Why can’t Brawn Pharmaceuticals Limited issue stop payment instructions to the bank on the original warrant and issue a duplicate immediately?

Since the dividend warrants are payable at par at more than 80 centres all over the country, it is not practically possible for the banks to issue stop payment instructions and it is therefore necessary for Brawn Pharmaceuticals Limited to wait till the validity of the original warrant expires.