20.—(1) An officer shall grant a request of the occupier of premises entered by the officer to allow a reasonable time for the occupier’s professional legal adviser to arrive at the premises before the investigation continues, if —
(a)
the officer considers it reasonable in the circumstances to do so; and
(b)
the officer is satisfied that such conditions as he considers it appropriate to impose in granting the occupier’s request are, or will be, complied with.
(2) In paragraph (1), “a reasonable time” means such period of time as the officer considers is reasonable in the circumstances.
(3) A person required by the Commission under section 63 of the Act to provide specified information or an explanation of a specified document in person may be accompanied by a professional legal adviser.