If the one being challenged requests a specific style, the one challenging needs to either abide by the request or decline the challenge. If accepted, their character has to stay within the restrictions of the style being used.
T1 RM: Absolutely no powers, mystic weaponry, no spells, no heightened abilities outside of normal human abilities. Ex: Sight {10ft to see clearly}, Speed {30mph max}, Reaction times {1.5 seconds +}
T1 UM: Only slight abilities are heightened. No chakra, energy, or spirit force abilities. Accepted abilities: Heightened strength {100 bodybuilders}, Speed {50mph tops}, Sight {1-2 mile distance}, reaction time {10-15 seconds}, hearing {slight air ripples}, smell {220 million smell receptors (=hound dog)}, and knowledge {slight whereabouts of foe}.
T1 MP: No powers capable of destroying entire planets, galaxies, or multiple dimensions. Energy/chakra-based attacks and combos. Basic abilities of energy and powers are acceptable. All elemental control is accepted as long as only 1-2 elements are being used at one time. You cannot use all of the elements in one attack.
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T1 Full Rule Set
AcakEverything you need to know about T1 Roleplaying. (Credit goes to Rj Gentry's "T1 Rules and Guidelines for the Modern Day Role Player" on Scribd), parts are taken from "Role Play 101" as well.