the new ribbon

for this event:

Conquistador Ribbon Event!
To celebrate the new map Spain SnD we will be having a special patch event with a Ribbon!
Between July 19 - 22nd Win 20 Spain SnD maps and collect 400 kills to win the following prize:
7 Day m66 handgun
30 Day Spain Namecard
Conquistador Ribbon!

what do the s&d requirements need to be? this may be a stupid question but, is there a limit to the rounds? time spent in-game etc?

thanks~