Here are the eligibility details from Party Gaming:
Only players that have signed up from your tracker and have earned 5 partypoints will be able to participate in the tournament. They need to have earned the points by 9am UK time the morning of 27th of June
If you're not aware, PartyPoints are the points earned when players play real money games within Party Poker. There's a definition on their website that explains how they are accrued and how many you have are displayed on your account page.
Any more information - contact Gary: