Certain work relating to substances which damage the ozone layer because it leads to the depletion of it may only be carried out by certain persons. These persons must, among other things, be reliable, have the necessary technical equipment and have demonstrated the necessary expertise.
Proof of expertise can be provided, for example, by attending training courses. Pursuant to Section 5 of the Chemicals Ozone Layer Ordinance, only those providers who are recognised by the competent body may carry out training events.
On request, an exemption from the need for technical and craft training may be granted, provided that the applicant proves that he is of comparable competence.