Scotland's 12 Premier League clubs agreed on Monday to punish any club whose fans show support for guerrilla groups as they toughened up their rules on "unacceptable conduct" at league matches.
The move follows a series of incidents this year.
Celtic, the 42-times Scottish champions, were last week fined 15,000 euros ($19,600) by European soccer's governing body UEFA after their fans sang pro-Irish Republic Army (IRA) chants at a Europa League match against Rennes of France on Nov. 3.