Accreditation and supervision of environmental verifiers 1. Member States shall each establish a system for the accreditation of independent environmental verifiers and for the supervision of their activities. To this end, Member States may either use existing accreditation institutions or the competent bodies referred to in Article 18, or designate or set up any other body with an appropriate status.
In respecting the general obligation to apply "good engineering practice", the approved laboratory involved under Article 4( 4) must consider the need to consult the approval body that granted the ETA about the deviations proposed by the producer.