(1) An ordinary or associate member may at any time after the payment of the first annual subscription compounded by the payment for all his or her future subscriptions, become a life member.
(2) A life member is entitled to the privileges of membership for life unless—
(a) he or she ceases to be a member under rule 18 or rule 19; or
(b) he or she is expelled under rule 20.
(3) The Council may compound the fee to be payable by a member under paragraph (1).
(4) The Council may fix a limit to the number of life members of the Trust.