In 1966, it was specified that opponents who "dance about or gesticulate in a way calculated to distract or impede the thrower" should be cautioned for ungentlemanly conduct. In 1997, this wording was updated to punish with a yellow card an opponent who "unfairly distracts or impedes the thrower" for "unsporting behaviour". In 2016, the same punishment was applied to an opponent who approaches closer than the minimum 2 metre distance; it was further specified than an indirect free-kick must be awarded if the ball has already been thrown in when the referee stops play to deal with the offence.