4.—(1) A justice of the peace may by signed warrant permit an authorised person or any other person to enter any premises in the exercise of the powers and duties under these Regulations or Article 19 of RAMS, if necessary by reasonable force, if the justice in England and Wales on sworn information in writing, in Northern Ireland on a complaint on oath, or in Scotland by evidence on oath is satisfied—
(a)that there are reasonable grounds to enter those premises for the purposes of enforcing these Regulations; and
(b)that any of the conditions in sub-paragraph (3) is met.
(2) Reference to a justice of the peace—
(a)in Scotland includes a sheriff;
(b)in Northern Ireland is a reference to a lay magistrate.
(3) The conditions are—
(a)entry to the premises has been, or is likely to be, refused and notice of the intention to apply for a warrant has been given to the occupier;
(b)asking for admission to the premises, or giving such a notice, would defeat the object of the entry;
(c)entry is required urgently;
(d)the premises are unoccupied or the occupier is temporarily absent.
(4) A warrant under sub-paragraph (1) is valid for one month.