26.— This Chapter applies to—

(a) Irish ships to which Part C of Chapter VII of the Annex to the Safety Convention applies, engaged in the carriage of cargoes of liquefied gases in bulk, and

(b) to any other ship to which such Part of such Chapter applies, engaged in such carriage while in any port in the State, unless it would not have been in such port but for stress of weather or any other circumstance that neither the master nor the owner of the ship could have prevented or forestalled.