ick , ▁when ▁the ▁k icker ▁will ▁attempt ▁to ▁score ▁a ▁goal ; ▁or ▁a ▁sc rum . ▁Play ers ▁may ▁be ▁sent ▁off ▁( sign alled ▁by ▁a ▁red ▁card ) ▁or ▁tempor arily ▁susp ended ▁(" sin - bin ned ") ▁for ▁ten ▁minutes ▁( yellow ▁card ) ▁for ▁f oul ▁play ▁or ▁repeated ▁in fr ing ements , ▁and ▁may ▁not ▁be ▁replaced . ▁ ▁Occ asion ally , ▁in fr ing ements ▁are ▁not ▁caught ▁by ▁the ▁ref eree ▁during ▁the ▁match ▁and ▁these ▁may ▁be ▁" c ited " ▁by ▁the ▁cit ing ▁commission er ▁after ▁the ▁match ▁and ▁have ▁pun ish ments ▁( us ually ▁susp ension ▁for ▁a ▁number ▁of ▁weeks ) ▁im posed ▁on ▁the ▁in fr ing ing ▁player . ▁ ▁Rep lac ements ▁and ▁substitution s ▁During ▁the ▁match , ▁players ▁may ▁be ▁replaced ▁( for ▁injury ) ▁or ▁subst it uted ▁( for ▁tact ical ▁reasons ). ▁A ▁player ▁who ▁has ▁been ▁replaced ▁may ▁not ▁re join ▁play ▁unless ▁he ▁was ▁tempor arily ▁replaced ▁to ▁have ▁ble eding ▁controlled ; ▁a ▁player ▁who ▁has ▁been ▁subst it uted ▁may ▁return ▁tempor arily , ▁to ▁replace ▁a ▁player ▁who ▁has ▁a ▁blood ▁injury ▁or ▁has ▁suffered ▁a ▁conc uss ion , ▁or ▁perman ently , ▁if ▁he ▁is ▁replacing ▁a ▁front - row ▁forward . ▁In ▁international ▁matches , ▁eight ▁rep lac ements ▁are ▁allowed ; ▁in ▁domestic ▁or ▁cross - border ▁tournament s , ▁at ▁the ▁dis cret ion ▁of ▁the ▁responsible