While officers of national or international labor organizations or
of intermediate bodies who have been elected by a vote of the delegates
to a convention may serve as delegates to conventions of their
respective labor organizations if the constitution and bylaws so
provide, they may not vote in officer elections at such conventions
unless they have also been elected as delegates by a secret ballot vote
of the members they are to represent. Of course, such officers may
participate in the convention, i.e., they may preside over the
convention, be nominated as candidates, or act in other capacities
permitted under the organization's constitution and bylaws.