Also the age of the players wil have a big influence of what rules aplly and what is legal as well. A player can be stopped by touching him. You have to use both hands to achief this. In touch football more rules are added as well. As the name already tells you, tacleing is legal here and flags are no-longer part of the outfit of the player.
Players wear protective gear like padding and helmets.
Full tacles and hits are allowed ofcourse with certain restrictions. In the rule-guide on this site I will explain this variant of football. I will however give notes in the guide on te other variants named above where this is apropriate. Now, here are some links for more information about the sport and links to the teams I follow closely. If you feel something is missing here, pleae let me know.