1. Validity will be written on your COP
2. When you get Indian CPL then you will have FRTO WITH VALIDITY ON IT.
3.you can renew COP if it has been issued to you, Based on your experience on handling aeronautical radio operation.
Once you get Indian CPL ,Indian DGCA will print validity as well.
FRTOL is after obtaining Indian CPL.
You can keep COP validation till 2014 and beyond