(a) For international matches a Union may nominate up to eight replacements/substitutes.
(b) For other matches , the Union or match organiser with jurisdiction over the match decides how many replacements/substitutes may be nominated to a maximum of eight.
(c) A Union (or Unions , where a match or competition is played between teams from two or more Unions) may decide how many replacements/substitutes may be nominated to a maximum of eight.
(d) A team can substitute up to three front row players (subject to Law 3.5 (b) and (c)) and up to five other players.
(e) Substitutions may only be made when the ball is dead and with the permission of the referee.