8(1)The load line rules shall make provision for determining the period during which any certificate issued under paragraph 6 of this Schedule is to remain in force, including—
(a)provision enabling the period for which any such certificate is originally issued to be extended within such limits and in such circumstances as may be prescribed by the rules, and
(b)provision for cancelling any such certificate in such circumstances as may be so prescribed.
(2)While any such certificate is in force in respect of a ship, there shall be endorsed on the certificate such information relating to—
(a)periodical inspections of the ship in accordance with the load line rules, and
(b)any extension of the period for which the certificate was issued,
as may be prescribed by the rules.