2.1.22 [W3C-P3P1.0] Section 4, Compact Policies
Compact policies are a performance optimization that is OPTIONAL for either user agents or servers. User agents that are unable to obtain enough information from a compact policy to make a decision according to a user's preferences SHOULD fetch the full policy.
All Document Modes (All Versions)
No option is available to set privacy preferences that require downloading the full P3P policy file. However, end users can customize several actions on compact P3P policies by clicking the Tools menu, clicking Internet Options, clicking the Privacy tab, and then clicking Import to select the appropriate compact P3P policy file.