Application and classification of ships
3. These Regulations apply in relation to:
(a)sea-going United Kingdom ships; and
(b)other sea-going ships while they are within the United Kingdom or the territorial waters thereof:
Provided that these Regulations shall not apply to a ship which is not a United Kingdom ship flying the flag of a State which is not a party to the International Convention for the Safety of Life at Sea 1974 by reason of her being within the United Kingdom or within the territorial waters thereof if she would not have been there but for stress of weather or any other circumstances which could not have been prevented by the master, the owner or the charterer (if any).