This Part does not apply to--
(a) the following ships unless the regulations declare otherwise--(i) a ship that has a gross tonnage of 400 or more,(ii) a ship used wholly for the purpose of recreational or sporting activities and not for hire or reward,(iii) a ship less than 30 metres in length,(iv) a seaplane,(v) a Government ship, other than a Government ship that is being used for commercial purposes, or
(b) a ship of any class declared by the regulations to be a class of exempt ship for the purposes of this Part, or
(c) a particular ship declared to be an exempt ship for the purposes of this Part by written notice of the Minister given to the owner or master of the ship.