A member of the Council or any of its committees, who has a personal interest in any contract or arrangement entered into or proposed to be considered by the Commission shall —

(a) disclose to the members of the Council the nature of the interest, in advance of any consideration of the matter ;

(b) not influence or seek to influence a decision to be made in relation to the matter ;

(c) take no part in any consideration of the matter ; and

(d) be absent from the meeting or that part of the meeting during which the matter is discussed.