Any organisation that imports or exports embryonic stem cells must be able to certify that they have been obtained in compliance with the principles mentioned in Articles 16 to 16-8 of the Civil Code, with the prior consent of the persons mentioned in Article R. 2151-4, at the origin of the embryo that was conceived in the context of medically assisted procreation and is no longer the subject of a parental project, and without any payment, of whatever form, having been allocated to these persons.