(24)In particular, the Commission should be empowered to draw up a list of categories, types and degrees of seriousness of infringements leading to the loss of good repute of road transport operators, to adapt to technical progress Annexes I, II and III to this Regulation concerning the knowledge to be taken into consideration for the recognition of professional competence by the Member States and the model certificate of professional competence, and to draw up a list of infringements which in addition to those set out in Annex IV to this Regulation may lead to the loss of good repute. Since those measures are of general scope and are designed to amend non-essential elements of this Regulation, inter alia, by supplementing it with new non-essential elements, they must be adopted in accordance with the regulatory procedure with scrutiny provided for in Article 5a of Decision 1999/468/EC.