This addendum specifies new symbols to be added to the indicated clauses of ISO 3767/1. It includes for clause 4.4: No. 16 to 19 (i.e. reverse, on, off, on-off); and for clause 5.3: No. 35 to 41 (i.e. lighter,front fog-light, rear fog-light, master lighting switch, hazard warning, beacon, side-lights or position-lamp).