This excerpt taken from the NDAQ 8-K filed Aug 3, 2006.
Sec. 7.1 The principal officers of the Corporation shall be elected by the Board and shall include a Chair, a Chief Executive Officer, a President, a Secretary, a Treasurer, and such other officers as may be designated by the Board. One person may hold the offices and perform the duties of any two or more of said principal offices, except the offices and duties of President and Vice President or of President and Secretary. None of the principal officers, except the Chair of the Board, need be Directors of the Corporation.