Commonwealth Consolidated Acts Commonwealth Consolidated Acts(1) A n opt - in declaration for a vessel ceases to be in force , unless s ooner revoked:
(a) a t the end of the period, if an y, s pecified in the declaration; or
(b) when the vessel ceases to have Australian nationality.
(2) AMSA must revoke a n opt - in declaration for a vessel if A MSA is requested to do so by the owner , or any of the owners, of the vessel and is satisfi ed of the matters prescribed by the regulations .
(3) AMSA may vary a n opt - in declaration for a vessel if:
(a) AMSA is satisfied that the name or any other details of the vessel have been changed since t he making of the declaration; and
(b) AMSA is satisfied that it is appropriate to vary , rather than revoke, the declaration.
(4 ) AMSA may revoke an opt - in declaration for a vessel if :
(a) AMSA is satisfied that the vessel no longer exists or has been lost; or
(b) AMSA is satisfied that the name or any other details of the vessel have been changed since the making of the declaration and that it is appropriate to revoke, rather than vary, the declaration ; or
(c ) AMSA is no longer satisfied as mentioned in s ubs ection 25 (2) in relation to the vessel .