‘Third man up' has become a thing of the past in a radical change to the AFL's laws of the game for 2017

In a surprise move, the AFL notified clubs on Wednesday that next season only nominated ruckmen will be able to compete at a contest for a throw-in or ball-up.

Other players will therefore no longer be permitted to contest a ruck contest as 'third man up'.

A stricter interpretation of deliberate rushed behinds will also be introduced and the interpretation of where a player draws high contact will be simplified.

The ban on the 'third man up' is sure to spark debate, with coaches split as to whether a rule was necessary when consulted on the proposed change at the annual AFL laws summit on the day of the NAB AFL Draft.

The AFL Commission approved the contentious recommendation from the League's football department that came after widespread consultation with a range of relevant stakeholders.

The AFL is understood to have been concerned that if it continued to allow players the ability to go 'third man up' the role of the ruckman would be under threat.

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AFL football operations manager Mark Evans said it was important a change was made to protect one of the game's unique features.

"Eliminating the 'third man up' at ruck contests will support the recruitment of tall players and ensure our game continues to be played at the elite level by players of various sizes and differing abilities," Evans said.

The incidence of players going 'third man up' at stoppages has increased dramatically in the past two years from 8.5 per cent in 2014 to 13.2 per cent last season.

“These Law changes and amendments are in keeping with the AFL’s strong stance to protect players against injury and to promote exciting football in all parts of the ground,” Evans said.

Clarification on the ‘protected area’ rule was also provided with a focus to be placed on whether players enter the protected area in a manner which impacts or could impact the kicker, particularly once the kicker has established a set position.

Separately, the operations of the Match Review Panel will have a number of changes next season including a stricter interpretation of impact for intentional strikes to the body.