1. The powers of any authorised person are—
(a)to enter at any reasonable time (or, in an emergency, at any time and, if need be, by force) any premises which he has reason to believe it is necessary for him to enter;
(b)on entering any premises by virtue of sub-paragraph (a), to take with him—
(i)any other person duly authorised by the enforcing authority and, if the authorised person has reasonable cause to apprehend any serious obstruction in the execution of his duty, a constable;
(ii)any equipment or materials required for any purpose for which the power of entry is being exercised;
(c)to make such examination and investigation as may in any circumstances be necessary;
(d)as regards any premises which he has power to enter, to direct that those premises or any part of them, or anything in them, shall be left undisturbed (whether generally or in particular respects) for so long as is reasonably necessary for the purpose of any examination or investigation under sub-paragraph (c);
(e)to take such measurements and photographs and make such recordings as he considers necessary for the purpose of any examination or investigation under sub-paragraph (c);
(f)to take samples, or cause samples to be taken, of any articles or substances found in or on any premises which he has power to enter, and of the air, water or land in, on, or in the vicinity of, the premises;
(g)in the case of any article or substance found in or on any premises which he has power to enter, being an article or substance which appears to him to be or contain a substance or preparation restricted under regulation 3, to cause it to be dismantled or subjected to any process or test (but not so as to destroy or damage it, unless that is necessary);
(h)in the case of any article or substance mentioned in sub-paragraph (g), to take possession of it and detain it for so long as is necessary for all or any of the following purposes—
(i)to examine it, or cause it to be examined, and to do, or cause to be done, to it anything which he has power to do under that paragraph;
(ii)to ensure that it is not tampered with before examination of it is completed; and
(iii)to ensure that it is available for use in any proceedings for an offence under regulation 11;
(i)to require any person whom he has reasonable cause to believe to be able to give any information relevant to any examination or investigation under sub-paragraph (c) to answer (in the absence of persons other than a person nominated by that person to be present and any persons whom the authorised person may allow to be present) such questions as the authorised person thinks fit to ask and to sign a declaration of the truth of his answers;
(j)to require the production of, or where the information is recorded in computerised form, the furnishing of extracts from, any records which it is necessary for him to see for the purposes of an examination or investigation under sub-paragraph (c) and to inspect, and take copies of, or of any entry in, the records; and
(k)to require any person to afford him such facilities and assistance with respect to any matters or things within that person’s control or in relation to which that person has responsibilities as are necessary to enable the authorised person to exercise any of the powers conferred on him by Part 1 of this Schedule.