(b) any other premises to which the Crown restricts access on the ground of national security.  (a) to fail to comply with a requirement imposed pursuant to this article; or  (b) to prevent any other person from—  (i) appearing before a Regulator or an authorised person; or  (ii) answering a question to which the Regulator or authorised person requires an  answer.  (a) on summary conviction in England and Wales, to a fine;  (b) on summary conviction in Scotland or in Northern Ireland, to a fine not exceeding the  statutory maximum;  (c) on conviction on indictment, to a fine.  (a) there are reasonable grounds for the exercise of the power; and  (b) one or more of the conditions in paragraph (2) are fulfilled in relation to the premises.  (a) the exercise of the power by consent in relation to the premises has been refused;  (b) a refusal of consent to the exercise of the power is reasonably expected;  (c) the premises are unoccupied;  (d) the occupier is temporarily absent from the premises and the case is one of urgency;  (e) a request for admission to the premises would defeat the purpose of the entry.  (a) a justice of the peace;  (b) in Northern Ireland, a lay magistrate; or  (c) in Scotland, a justice of the peace or sheriff.  (a) in England, Wales and Northern Ireland, against that person in any proceedings;  (b) in Scotland, against that person in criminal proceedings.  (a) section 5 of the Perjury Act 1911( a );  ( a ) 1911 c. 6.  26 (3) Paragraph (2) does not apply to an offence under—  (2) In criminal proceedings in which the person referred to in paragraph (1) is charged with an  offence, no evidence relating to the person’s answer may be adduced and no question relating to it  may be asked by, or on behalf of, the prosecution unless evidence relating to it has been adduced  by, or on behalf of, the person.  49. —(1) An answer given by a person in compliance with article 47(1)(c)(ii) is admissible in  evidence—  Admissible evidence  (4) In paragraph (1), “judge” means—  (3) A warrant in accordance with this article continues to have effect until the purpose for which  it was issued has been fulfilled.  (2) The conditions referred to in paragraph (1)(b) are that—  48. —(1) A judge may by warrant authorise a Regulator to designate an authorised person to  exercise the power in article 47(1)(a), in accordance with the warrant, where satisfied that—  (5) A person guilty of an offence under paragraph (4) is liable—  Warrants  (4) It is an offence for a person— 