for production in uspsa, all mag pouches and holsters must be behind the hip bone. you can feel the hip bone on each side of your belly that is the forward most position. after that you could have mag pouches on your belt till they hit your holster. although you shouldn't need that many.
your holster should be on you right side(or you strong hand.). mag pouches on the left
That's what I thought. But, I've seen video demonstrations and the shooter appears to be wearing them much closer towards the front of the body. Maybe it depends on the class. I need to practice and I want them in the correct position. Thanks