A trade union shall secure that a person does not at any time hold a position in the union to which this section applies if—
Subject to subsection (4), the positions to which this section applies are—
For the purposes of subsection (2)(a) "member of the executive" includes any person who, under the rules or practice of the union, may attend and speak at some or all of the meetings of the executive, otherwise than for the purpose of providing the committee with factual information or with technical or professional advice with respect to matters taken into account by the executive in carrying out its functions.
This section does not apply to the position of president or general secretary if the holder of that position—
In subsection (4)(a) "a voting member of the executive" means a person entitled in his own right to attend meetings of the executive and to vote on matters on which votes are taken by the executive (whether or not he is entitled to attend all such meetings or to vote on all such matters or in all circumstances).