Division 2.27 F1 Original text. Later amendments are not shown. ‘ Chunking ’ means the breaking away of pieces of rubber from the tread. Annotations Textual amendments F1 Substituted by Council Decision of 13 March 2006 amending Decisions 2001/507/EC and 2001/509/EC with a view to making United Nations Economic Commission for Europe (UN/ECE) Regulation Nos 109 and 108 on retreaded tyres compulsory (2006/443/EC). ← Division 2.26 Division 2.27 Division 2.28 →