Athletes who participate in this summer’s Tokyo Olympics will not be allowed to wear “Black Lives Matter” apparel.

The ruling will be part of the International Olympic Committee’s (IOC) long-standing ban on “demonstration or political, religious or racial propaganda.” Athletes cannot wear the clothing on the medal stand, playing field or during the official ceremonies. However, “Black Lives Matter” slogans will be allowed during some parts of the Olympics, including press conferences, interviews and team meetings.

So far, the IOC has not revealed what punishment athletes could face if they violate those rules. They said that each violation will be treated on a case-by-case basis.

The IOC claims that more than two-thirds of the athletes do not think it’s appropriate to protest during the competition.

“A very clear majority of athletes said that they think it’s not appropriate to demonstrate or express their views on the field of play, at the official ceremonies or at the podium,” IOC Athletes’ Commission Chief Kirsty Coventry said. “So, our recommendation is to preserve the podium, field of play and official ceremonies from any kind of protest, or demonstrations or acts perceived as such.”

Athletes who choose to protest will have the support of many groups, including The World Players Association Union.

“Any athlete sanctioned at the Tokyo Olympics will have the full backing of the World Players,” said Brendan Schwab, the union’s executive director.

The organization Global Athlete encouraged athletes to “not allow outdated ‘sports rules’ to supersede your basic human rights.” Two-time Olympian Noah Hoffman, who is part of Global Athlete, believes that it is time to “elevate the voice of the international athlete.”

“We envision an Olympics where the athletes are the center of the show, more than the host country or the politics around it or the sponsors,” he said. “It is this huge spectacle where the athletes are an afterthought.”