Prior to the May 2009 update, the rules were organised by number, not by topic.
The former in-game rules include:

  1. Offensive Language (includes spamming)
  2. Item Scamming
  3. Pass word Scamming
  4. Bug Abuse (Cheating)
  5. Jagex Staff Impersonation
  6. Account Sharing/Trading
  7. Using Third Party Software Like Bots (titled "Macroing" in-game)
  8. Multiple Logging-In
  9. Encouraging Others to Break Rules (all rules included)
  10. Advertising/Websites
  11. Real World Item Trading
  12. Asking for Personal Details (phone numbers,emails etc.)