(Regulation 18) essentially states that on the break shot, a minimum of three object balls must either be pocketed, or touch the head string, or a combination of both.
This is a rule that is used in many tournaments nowadays, WPA uses it, but I am wondering one thing, is there a condition or certain aspect in the game where this rule must be applied? Basically what I am asking is, is there a regulation that states that.
If A is used, then the three-point break rule must be applied in the game? or is it just a tournament director/promoter decision?
I know that during friendly play, the two players can decide between themselves whether they would like to use the rule or not, but other than this, is there a certain situation where this is a must and applicable.