In consideration seriatim, each part is considered separately and then the entire document is open for consideration. At this time, a motion could be made to strike out one of the parts.
The bylaws could be amended only by following the procedures described in the bylaws for their amendment. A motion that conflicts with the bylaws is null and void. In this case, a point of order could be raised at the next meeting.
Ultimately it is up to your organization to interpret your bylaws. Your organization will have to decide whether being nominated by the Board Development Committee is a qualification for Trustee.