34.—(1) The Permit Authority must make the register available for inspection at all reasonable hours and free of charge —
(a)so far as it relates to restricted information, by any person having authority to execute works of any description in the street, or otherwise appearing to the authority to have a sufficient interest, and
(b)so far as it relates to information which is not restricted, by any person.
(2) For the purposes of paragraph (1), restricted information is —
(a)information certified by, or with the authorisation of, the Secretary of State as being restricted information for the purpose of safeguarding national security; or
(b)information certified by, or with the authorisation of, an undertaker as being restricted information because its disclosure would, or would be likely to, prejudice the commercial interests of that undertaker.