Must be registered in the Dota Pro Circuit (DPC) system; Must not be under an active Valve competitive ban; Regional roster lock rules apply during DPC seasons
Why people argue about this
People often assume that just registering for the DPC system automatically makes a player eligible in Dota 2 tournaments, forgetting they also need to ensure there's no active Valve competitive ban on their account. The confusion arises because the official rule emphasizes both conditions must be met simultaneously for eligibility, not just one of them.