Whois or not Whois - That is the Quesion

With several options for Private Whois providers in the Internet arena, is there a need for a formal agreement on what information needs to be listed on the public Whois database? As ICANN Working groups go back and forth to come up with a new way to allow privacy, but with the ability to obtain the appropriate information about a registrant for disputes, the question may have already been solved with the assistance of Private Whois providers that provide the privacy a registrant needs but with the ability for the provider to divulge a registrant name to law enforcement, in most cases.