Amends INTRODUCTION, clauses 1, 12, subclauses 12.2.1, 12.4, 12.4.1, adds the new subclauses 3.3, 3.4, 5.10, 11.3, 12.3.2, 12.5.2, 12.6.2, 12.7, 13.1.1 to 13.1.4, 16.7 (16.7.1 to 16.7.6), new tables 5 to 7, new figures 2b and 2c, and annex A (IEC U-matic