It’s a defining image of the 20th century.

American track athletes John Carlos and Tommie Smith, both wearing a single black glove with their fists raised on the Olympic podium in a Black Power salute at the 1968 Mexico Olympics.

Australian runner Peter Norman, the silver medal winner in the race, stood in solidarity, not with his fist raised but in support of what was a protest against racial segregation both in America and around the world. He wore a badge with “Olympic Project for Human Rights” written on it.

But according to current Olympic rules, all three athletes would have been in breach of the obligations under what is known as Rule 50 of the Olympic Charter - which states that any demonstration of a political, religious or racial nature isn’t allowed in the field of competition, or during medal ceremonies.