(1) If the parties fail to take any steps in the proceeding for more than 150 consecutive days, the Tribunal shall notify them of the time elapsed since the last step taken in the proceeding.

(2) If the parties fail to take a step within 30 days after the notice referred to in

paragraph (1)

, they shall be deemed to have discontinued the proceeding and the Tribunal shall issue an order taking note of the discontinuance.

(3) If either party takes a step within 30 days after the notice referred to in

paragraph (1)

, the proceeding shall continue.

(4) The Secretary-General shall issue the notice and the order referred to in paragraphs (1) and (2) if the Tribunal has not yet been constituted or if there is a vacancy on the Tribunal.