The following revisions have been formally approved and are marked by the symbol delta in the margin on the replacement pages:
Revised: Clauses 3.2.1, 3.2.3, 3.2.4, 5.2.2.3, 7.3.3, and 10.1.7, Tables 1 and 2, and Figures 6 and 13.
New: Clause 10.1.4.3.