Division 4.1.9 Measurement validation United Kingdom Original text. Later amendments are not shown. 4.1.9.1Division 4.1.9.1 4.1.9.2Division 4.1.9.2 4.1.9.3Division 4.1.9.3 4.1.9.4Division 4.1.9.4 ← Division 4.1.8 Division 4.1.9 Division 4.1.9.1 →