Section 3(n) of the Act defines the word ``officer'' and it is this
definition which must be used as a guide in determining what particular
positions in a labor organization are to be filled in the manner
prescribed in the Act. For purposes of the Act, ``officer'' means ``any
constitutional officer, any person authorized to perform the functions
of president, vice president, secretary, treasurer, or other executive
functions of a labor organization, and any member of its executive board
or similar governing body.''