Richmond coach Terry Wallace admits to confusion about what body contact is allowed in the AFL, but the message to his players remains unambiguous.

"Go and get the footy - if you go and get the footy, you don't have to worry about it (bumping) too much," Wallace said.

"I'd rather see their head over the ball and getting it first."

Wallace said several incidents during the opening round of the pre-season competition had left him unsure about what sort of bumping was allowed.

The issue was highlighted last week, when Collingwood captain Nick Maxwell unsuccessfully contested his rough conduct charge at the tribunal.

But last Friday, he became the first player to successfully challenge a suspension under the current tribunal system when the appeals panel ruled in his favour.

Wallace will not specify which incidents have left him looking for answers.

He said he had spoken to former Tigers great Kevin Bartlett, a member of the AFL's Laws of the Game committee, on Tuesday morning about the matter.

Wallace thinks the official rules DVD which the AFL distributes before each season sets out clearly what sort of bumping is legal and what contact will result in sanctions.

But he has concerns about how the league has handled several incidents so far during the pre-season.

"We (AFL coaches) have a meeting prior to the start of the season and we'll look for a little bit of clarification surrounding the bump," he said.

"We all probably have our varying opinions on three or four or five incidents over the last couple of weeks, what should or shouldn't have been done with them.

"I'm not sure whether the adjudication from that has been identical to what the DVD was.

"So that's just where the clarification needs to come in.

On Tuesday, Hawthorn midfielder Clinton Young and Port Adelaide forward Daniel Motlop accepted reprimands for their rough conduct charges.

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