Each chairman, treasurer, and campaign manager shall be a registered voter of the State. Subject to paragraph (2) of this subsection, a candidate may not act: as the treasurer of a campaign finance entity of the candidate; or with respect to any other campaign finance entity: as the campaign manager or treasurer; or in any other position that exercises general overall responsibility for the conduct of the entity. An incumbent member of a central committee who is a candidate for election to party office may act as a responsible officer of that central committee. With respect to any campaign finance entity other than the candidate’s own campaign finance entity, a candidate for delegate to the Democratic National Convention or a candidate for delegate to the Republican National Convention may act: as the campaign manager or treasurer; or in any other position that exercises general overall responsibility for the conduct of the entity. Subject to subsection (b) of this section, the chairman, treasurer, or campaign manager of a campaign finance entity may serve as the chairman, treasurer, or campaign manager of another campaign finance entity.