One distinguishes between the cue-ball on the one hand and the two other balls called objectballs on the other hand.

1. The number and the area of barred zones are determined by the congress. These zones are delimited by lines drawn as fine as possible with chalk, in pencil or with ink. (paper B)
2. Within each of these barred zones the player will only be allowed to execute the authorized number of cannons in the course of his serie which means that he must force the two opposing balls to leave the zone in which they are, by means of the determined stroke.

(paper E)

1. The position "come in" is reached:
   when the object-balls are at rest in the same zone while before the stroke of the cue they were in another zone or in two different zones or in this same zone but that one or both of the object-balls were leaving in order to integrate this zone once again (indicated by "come in").
2. The position "in there" is reached:
   1. when a cannon is made after the position "come in" without one of the object-balls leaving the zone (indicated by "in there");
   2. concerning cadre with one stroke on the same condition mentioned in point a) above but indicated by "in there" instead of "come in".
3. The position "astride" is reached:
   when the two object-balls are at rest near a line of the zone but each of them in a different zone (indicated by "astride").
4. The object-ball exactly placed on the line of the zone is considered to be disadvantageous for the player.
5. One or the two object-balls are able to integrate once again and immediately the zone which they leave in such a way that they form once again the position "come in" or "in there".
6. The position relating to cadre is represented before it gets into the anchor. If the two positions are the same the announcement will only be effected once followed by "everywhere".

As soon as a carom is effected by leaving the position "in there" and as soon as no object- ball leaves the zone there will be a foul (indicated by "remaining in there").