How I understood it was that you could have a max of 5 non-fed trained players in your squad and a max of 5 quota players.
Now some of those players will be non-fed trained and count on the quota like Blake Green
Some will be non-fed trained and NOT count on the quota like Wille Mason (due to his Tongan passport getting him off the quota but not off the non-fed trained list)
And some will not count as either non-fed trained or on the quota like Mick Vella (due to being contracted to Hull KR for the 2008 season so gets off non-fed trained and has been here 3 years so gets off quota)
The 2 rules, non-federation trained (brought in 200icon_cool.gif and overseas quota (been around for ages) run in conjunction with each other. That's how I understood it anyway