271.If a person undertakes a licensable activity without a licence but does so for the purpose of securing the safety of a vessel, aircraft or structure, or for the purpose of saving life, the person has a defence against a charge under section 85(1). However, this is dependent on the person informing the licensing authority within a reasonable time of the matters specified in subsection (2); on the steps taken being necessary and reasonable; and on it not being the person’s fault that the emergency occurred.