2.2.9 [W3C-P3P1.0] Section 3.6, User Preferences
User agents MUST document a method by which preferences can be imported and processed, and SHOULD document a method by which preferences can be exported.P3P user agents MUST act according to the preference settings selected by the user.
All Document Modes (All Versions)
The following clarifications apply:
No method is provided to export preferences.
For sites that specify compact headers, only imported preferences are acted upon. Actions based on the data described in the full P3P policy are not blocked.