i personally do not like ICCS. Their holders are too flimsy and are not internationally recognized as PCGS or NGC. I always go with NGC for none
US coins and their holders are beautiful to display which is always a factor in my decision.
to send a coin for grading to NGC or PCGS you can either purchase a yearly membership and get the privilege to submit the coins direclty or just do it through an authorized third party (what I did)
ICCS doesn't have a website but here is their address and phone number : 2010 Yonge St, Toronto, ON M4S 1Z9 416-488-8620
give them a call and check how to submit the coin.