An inspector may, on production (if so required) of his authority, exercise any of the powers specified in subsection (3) below for the purposes of the discharge of the functions of the Secretary of State under this Part.
Those powers are exercisable—
but they are not exercisable in relation to premises used wholly or mainly for domestic purposes.
The powers of an inspector are—
The Secretary of State may by regulations make provision as to the procedure to be followed in connection with the taking of, and the dealing with, samples under subsection (3)(d) above.
Where an inspector proposes to exercise the power conferred by subsection (3)(e) above, he shall, if so requested by a person who at the time is present on and has responsibilities in relation to those premises, cause anything which is to be done by virtue of that power to be done in the presence of that person.
Before exercising the power conferred by subsection (3)(e) above, an inspector shall consult such persons as appear to him appropriate for the purpose of ascertaining what dangers, if any, there may be in doing anything which he proposes to do under the power.
Where under the power conferred by subsection (3)(f) above an inspector takes possession of anything found on any premises, he shall leave there, either with a responsible person or, if that is impracticable, fixed in a conspicuous position, a notice giving particulars sufficient to identify what he has seized and stating that he has taken possession of it under that power; and before taking possession under that power of—
an inspector shall, if it is practical and safe for him to do so, take a sample of it and give to a responsible person at the premises a portion of the sample marked in a manner sufficient to identify it.
No answer given by a person in pursuance of a requirement imposed under subsection (3)(g) above shall be admissible in evidence—
The powers conferred by subsection (3)(a), (b), (c), (d), (e) and (h) above shall also be exercisable (subject to subsections (4), (5) and (6) above) by any person authorised for the purpose in writing by the Secretary of State.
Nothing in this section shall be taken to compel the production by any person of a document of which he would on grounds of legal professional privilege be entitled to withhold production on an order for discovery in an action in the High Court or, in relation to Scotland, on an order for the production of documents in an action in the Court of Session.