Here it is (not sure if this answers my question)-
http://www.playbca.com/Leagues/LeaguePolicies/tabid/108/Default.aspx
B. Phenolic Tip Rule:
As of June 1, 2009, the Official Rules of the BCA Pool League in “Equipment Specifications” under “Cues,” item d. states:
“The cue tip must be composed of leather, fibrous, or pliable material. Phenolic cue tips are not permitted.”
The BCA Pool League is amending this rule to state:
“THE CUE TIP ON BREAK CUES MUST BE MADE OF LEATHER WITH NO NON-LEATHER MATERIALS ADDED TO THE CONTACTING SURFACE.”
There have been questions asked, such as: “What if I break with my jump cue?” and similar questions. It is very simple. Whatever cue you break with must have a leather tip.
The reason for this rule is that the BCA Pool League has witnessed too many examples of damaged cue balls. After consultations with Aramith and Simonis, it has been determined the major contributing factor in cue ball damage is the hardness of the tip on break cues.
For several years the WPA has taken the position that the cue tip may not be of a material that can scratch or damage the cue ball. The BCAPL subscribes to the WPA philosophy.
This policy only applies to break cues. Jump cues are allowed to have a leather or non-leather tip - since it is difficult to stroke with enough force to cause damage.
This rule will be in effect at the BCAPL National 8-Ball Championships and regional tournaments that the BCAPL promotes. Promoters, directors and operators of events such as league play or local tournaments may alter the rules as they see fit.