From the Reference - Expanded & updated second edition.
pt. 1. Terms, style and use
4. Abbreviations and post nominals
5. Addresses, salutations and closings
6. Invitations, place cards and name badges
9. Joint forms of address
11. Professionals and academics
12. U.S. Federal, state and municipal officials
14. U.S. Diplomats and international representatives
15. U.S. tribal officials
16. Clergy and religious officials
19. British officials, royalty and nobility
20. International officials and diplomats
pt. 3. Country names and officials
21. Country names and officials.