I am even waiting for margin against shares (MAS) ...They announced it but nothing heard after that. I am waiting for both bracket order stoploss and MAS.
POA given at the time of opening a demat account is only for pay-in of shares from your demat account to exchange. If POA is not provided, you will have to manually payin shares to exchange each time you sell the shares.
When you open a demat account with RKSV, POA is mandatory.