For each model of personal protective equipment manufactured, a notified body chosen by the manufacturer shall take an adequate sample of the personal protective equipment at random intervals, at least once a year. Under its responsibility, it shall examine the sample and perform the appropriate tests defined by the standards referred to in 6° of Article L. 4311-7 or necessary to ensure that the samples of personal protective equipment comply with the technical rules applicable to them.The notified body, if it is not the body which issued the EC type-examination certificate, shall contact the latter in the event of difficulty in assessing the conformity of the personal protective equipment taken from the sample. The notified body shall send the manufacturer an expert report within two months of the expert assessment.