What everyone has said..LOL!
Here's a summary:
A person cannot be a member of multiple BNI chapters or any other networking groups (ie, LeTip, etc..)
A company may occupy as many seats in different chapters as there are different people attending.
A member in one chapter may substitute for another chapter, and this is not limited to your profession. (ie, a carpet cleaner in chapter A, may substitue for any other profession in chapter B, including his own. He cannot substitute for a profession more than 3 times per 6 months)
3 latenesses equal one abscence
3 abscences in a 6 month period may qualify for termination without refund
Substituted for does not count as an abscence.
It would be wise to network outside your chapter for a substitute.