▁phys i other ap ist ▁concerned . ▁Where ▁a ▁person ▁or ▁organisation ▁bre aches ▁this ▁requirement , ▁the ▁person ▁or ▁organisation ▁may ▁be ▁pro sec uted ▁for ▁a ▁criminal ▁off ence . ▁The ▁chair person ▁or ▁deput y ▁chairman ▁dec ides ▁all ▁questions ▁of ▁law ▁or ▁matters ▁of ▁legal ▁principle . ▁Their ▁decision ▁is ▁final ▁on ▁the ▁point . ▁In ▁matters ▁of ▁fact ▁or ▁evidence , ▁three ▁of ▁the ▁four ▁members ▁must ▁agree . ▁If ▁the ▁decision ▁is ▁split ▁two - two , ▁then ▁the ▁chair person ▁or ▁deput y ▁chair person ▁has ▁the ▁casting ▁vote . ▁Gener ally ▁the ▁rules ▁of ▁evidence ▁( which ▁the ▁limit ▁the ▁type ▁of ▁evidence ▁which ▁a ▁court ▁can ▁recogn ise ) ▁do ▁not ▁need ▁to ▁be ▁observed ▁in ▁the ▁trib unal . ▁However , ▁because ▁of ▁the ▁serious ▁nature ▁of ▁the ▁proceed ings , ▁they ▁are ▁generally ▁heard ▁ ▁with ▁a ▁high ▁degree ▁of ▁form ality . ▁Wit ness es ▁are ▁called , ▁and ▁their ▁testim ony ▁is ▁given ▁on ▁o ath ▁in ▁the ▁same ▁way ▁that ▁evidence ▁is ▁given ▁in ▁a ▁court ▁of ▁law . ▁The ▁trib unal ▁is ▁emp ower ed ▁to ▁issue ▁summ ons ▁to ▁comp el ▁people ▁to ▁attend ▁the ▁trib unal ▁to ▁give ▁evidence . ▁The ▁trib unal ▁may ▁also ▁direct ▁a ▁written ▁notice ▁for ▁a ▁person ▁or ▁organisation ▁to ▁produce ▁documentation . ▁ ▁Out comes ▁If ▁the ▁trib unal ▁after ▁an ▁inqu iry ▁determ ines ▁the ▁matters ▁proved ▁against ▁the ▁phys i other ap ist , ▁the ▁trib unal ▁has