4.—(1) The Scottish Ministers may approve any laboratory that they consider to be suitable for the purpose of testing samples submitted under article 7(2)(b) or 15(2)(b).
(2) Approval must be in writing and may be granted subject to such conditions as the Scottish Ministers may impose in respect of the laboratory on its operator.
(3) For the purpose of deciding whether to grant an approval under this article, the Scottish Ministers may require a laboratory to undergo such inspections and quality assurance testing as they consider necessary.