The BCAPL Rulebook Sourced from:
http://www.playbca.com/Downloads/Rulebook/CompleteRulebook.aspx
States:
1.41 Coaching
1. During your match, it is a foul if you ask for or intentionally receive assistance in planning or executing any shot.
2. Any person, except your opponent, who offers any significant assistance to you, whether verbal or non-verbal, will be removed from the area.
3. The Administrative Authority of the event may modify this rule for team or doubles play. (AR p. 84)
Applies Rulings p. 84
1.41 Coaching
It is common for Administrative Authorities to modify or relax coaching rules during doubles or team play. It is also common to have controversies caused by that situation. When coaching rules have been modified, you must be sure that you understand the modifications and that you take care not to violate them.
Billiards-related written reference material may not be consulted during your match. Exceptions: Score sheets (including foul counts and any other necessary scoring information) and other match-related administrative material. The BCAPL Rule Book may also be consulted. However, a match may not be delayed unnecessarily to consult a rule book. If you have a rules-related question, summon a referee for assistance.
I hope this helps.