Following Sebastian Vettel's double block of Lewis Hamilton in Russia, the FIA have been forced to clarify the rules on the tactic in case of similar incidents in future races.
The incident in question was brought up in the drivers briefing in Japan last weekend, with drivers seeking clarification on what they can and can't do when defending position.
The FIA have now made it clear to drivers that making two defensive moves in separate directions will lead to an investigation by the stewards and then a penalty potentially beyond that.
Despite Hamilton believing Vettel did this to him in Russia, race director Charlie Whiting has maintained that Vettel's actions could not be viewed as two separate moves because they were in the same direction.
However, Whiting went on to say similar moves may not be allowed in the future if a time gap exists between the moves.
"The rule about two moves is traditionally about making a move one way and then making a second move the other way," Whiting said.
"Everyone felt that that was what was generally understood by the rule, but I must say that when I first saw the incident in the race in Russia I thought the same: '[Vettel] has moved twice' when I saw it from Lewis' onboard.
"But when you look at it from track cameras and a forward shot when they are coming towards you, it is much less clear - it looks like one move with a hesitation.
"It doesn't look like two distinct moves, which is why the stewards did not feel that they could justify a penalty.
"What I did clarify to them is that if a driver does two moves in the same direction, that is the same as doing one in either direction," he said.
"So if Seb had gone once, looked and then gone again, very clearly, I think that would be equally bad as making a move in either direction."