Information is also provided on documents produced by the Organisation, divided, according to their nature and scope, into the following groups:
- General Instructions (classified by sector) [1]
- General Instructions (classified by activity) [2]
- Circulars (classified by sector) [3]
- Circulars (classified by activity) [4]
- Interpretative notes (classified by sector) [5]
- Interpretative notes (classified by activity) [6]
- Guides (classified by activity) [7]