A person who, without having been designated or authorised for the purpose by a relevant undertaker, purports to be entitled to enter any premises or vessel in exercise of a power exercisable in pursuance of any such designation or authorisation shall be guilty of an offence and liable, on summary conviction, to a fine not exceeding level 4 on the standard scale.

For the purposes of this section it shall be immaterial, where a person purports to be entitled to enter any premises or vessel, that the power which that person purports to be entitled to exercise does not exist or would not be exercisable even if that person had been designated or authorised by a relevant undertaker.