▁the ▁ability ▁to ▁pun ish ▁members ▁who ▁step ▁out ▁of ▁line ▁or ▁dis ob ey ▁their ▁orders . ▁The ▁pres iding ▁officers ▁also ▁have ▁powers ▁to ▁sum mon ▁witness es ▁to ▁the ▁chamber ▁to ▁assist ▁in ▁the ▁legisl ative ▁role ▁of ▁Parliament . ▁ ▁The ▁pres iding ▁officers ▁also ▁over see ▁votes ▁within ▁their ▁respective ▁ch amb ers ▁and ▁provide ▁proof ▁of ▁ass ent ▁in ▁the ▁instance ▁that ▁a ▁bill ▁is ▁passed . ▁This ▁proof ▁is ▁needed ▁for ▁a ▁bill ▁to ▁be ▁presented ▁to ▁the ▁Governor ▁for ▁royal ▁ass ent . ▁ ▁The ▁pres iding ▁officers ' ▁voting ▁roles ▁are ▁different . ▁The ▁Spe aker ▁of ▁the ▁Assembly ▁only ▁has ▁a ▁casting ▁vote , ▁while ▁the ▁President ▁of ▁the ▁Council ▁only ▁has ▁a ▁deliber ative ▁vote . ▁The ▁speaker ▁may ▁therefore ▁only ▁vote ▁when ▁a ▁matter ▁is ▁tied , ▁with ▁their ▁casting ▁vote ▁determ ining ▁the ▁outcome . ▁This ▁is ▁consistent ▁with ▁the ▁West min ster ▁tradition ▁of ▁the ▁speaker ▁acting ▁as ▁an ▁im partial ▁ar b iter . ▁Some ▁pieces ▁of ▁legisl ation , ▁such ▁as ▁alter ing ▁the ▁Constitution , ▁require ▁an ▁absolute ▁majority ▁( 4 5 ▁of ▁the ▁ 8 8 ▁possible ▁votes ) ▁to ▁pass . ▁It ▁is ▁therefore ▁mathemat ically ▁impossible ▁for ▁a ▁speaker ▁to ▁pass ▁such ▁legisl ation ▁with ▁their ▁casting ▁vote , ▁as ▁the ▁largest ▁possible ▁tied ▁vote ▁is ▁ 4 3 : 4 3 . ▁The ▁President ▁used ▁to ▁have ▁the ▁same ▁power , ▁but ▁their ▁role ▁has ▁changed ▁over ▁time . ▁Con sequently ,