Looking at the AZ page of Tours and Tournaments, I found there are 7 Professional Tours and 41 Other Tours. I was just wondering, what the criteria is and who makes the decision that allows or prohibits certain players from playing in these 48 tours. I'm not a tour player so I'm looking for answers.
I think I'm right
when I say, most amateurs can play in what are called "Pro" tournaments........just post the entry fee and take your best shot. 
I think I'm right

