Section 31. Accredited Professional Organization. —

All professional customs brokers shall have one national organization, which shall be recognized by the Board and by the Commission as the one and only accredited professional organization of customs brokers. A professional customs broker duly registered with the Board shall automatically become a member of the accredited professional organization of customs brokers and shall receive the benefits and privileges appurtenant thereto. Membership in the accredited professional organization of customs brokers shall not be a bar to membership in other associations of customs brokers.