5.—(1) The Scottish Ministers may by notice given to the operator of an approved laboratory suspend or revoke an approval granted under article 4 if—
(a)they consider that the approved laboratory is no longer suitable for the purpose of carrying out testing of samples submitted to it under article 7(2)(b) or 15(2)(b); or
(b)they have reason to believe that the conditions of its approval have not been, or are not being, complied with.
(2) For the purpose of deciding whether to suspend or revoke an approval under this article, the Scottish Ministers may require the laboratory to undergo such inspections and quality assurance testing as they consider necessary.
(3) Suspension of an approval under this article lasts for such period, or until such state of affairs exists, as the Scottish Ministers specify when suspending the approval.
(4) The operator of an approved laboratory may by notice given to the Scottish Ministers indicate that it no longer wishes approval, in which case the approval ceases to have effect.