Chapter IV Procedure for adaptation to technical progressF1 United Kingdom Repealed Original text. Later amendments are not shown. 17Article 17 18Article 18 Annotations Textual amendments F1 Repealed by Regulation (EU) No 168/2013 of the European Parliament and of the Council of 15 January 2013 on the approval and market surveillance of two- or three-wheel vehicles and quadricycles (Text with EEA relevance). Chapter IV