The Board of Governors, upon the vote of two-thirds of the membership of the Board, may refer any question to a vote of the membership of the State Bar. The members present at an annual meeting may, by a two-thirds vote, direct the Board of Governors to conduct a referendum upon any matter presented or acted upon at that meeting. When a referendum is conducted, the Executive Director shall prepare a questionnaire containing the matters upon which the vote is to be taken. The questionnaire submitted to each member shall be returned to the Executive Director.