Liverpool fans in Paris for the Champions League final against Real Madrid may be fined if they wear club colours around the Champs Elysees.
The wearing of football colours is prohibited in the popular tourist attraction area from the Place de la Concorde to the Arc de Triomphe.
Those who dress in club scarves, hats or display banners can also be fined 135 euros by police.
The dress code rules will be enforced until 18:00 BST on Sunday, 29 May.
Liverpool have received an allocation of 19,618 tickets for the match at Stade de France on Saturday.