5. Any person required under regulation 2(1) or 3(2) to make a report shall, if possible, make such a supplementary report or reports as may be appropriate in the circumstances —
(a)
supplementing the information contained in the initial report as necessary;
(b)
providing information concerning further developments; and
(c)
complying as fully as possible with any request for additional information made by or on behalf of the government of a state whose interests may be affected by the incident.