3.As regards crop-grown preservation mixtures, when a Member State examines an application, it shall carry out tests or tests shall be carried out under official supervision of the Member State to check that the preservation mixture complies, at least, with the authorisation requirements provided for in Article 6(2) and (3).Such tests shall be carried out in accordance with current international methods, or, where such methods do not exist, in accordance with any appropriate methods.For those tests the Member State concerned shall ensure that samples are drawn from homogenous lots. It shall ensure that the rules on lot weight and sample weight provided for in Article 7(2) of Directive 66/401/EEC are applied.