05 / 20 Explanatory notes and how they are used

Explanatory notes and how they are used

What the explanatory notes contain for a category, how inclusions and exclusions are stated, and how borderline cases are handled.

The four levels

  1. Level 1 Section One letter
  2. Level 2 Division Two digits
  3. Level 3 Group Three digits
  4. Level 4 Class Four digits

Guides in this cluster

All guides or home.