God this is getting more and nore confusing....
This is how i read it:
ONE short OR long sleeved undershirt WITHOUT padding, + playing jersey WITHOUT padding + elbow/forearm pads = OK
If padding is incorporated in either the playing jersey OR undershirt then NO extra forearm/elbow pads are allowed to be worn (ie no TWO layers of PADDING).
Likewise the playing shirt and undershirt cannot BOTH have padding. (eg you can't wear TWO Dye tops)
And thats about it isn't it? TWO layers of clothing and ONE layer of padding either incorporated in clothing or separate.