Section 841. Referendum. -- The House of Delegates may, at any time, by a majority vote of all voting Delegates in office, refer and submit to the Active Members or to the membership of Local Bar Associations, defined questions affecting the substance or the administration of the law or affecting the policy or recommendations of the Association, which in the opinion of the House are of immediate practical consequence to the legal profession and the public throughout this Commonwealth. The result of a referendum, when duly ascertained by such a vote, shall control the action of the Association.