DomainMondo.com Directory:

2015-04-27

Effective Dates for ICANN Additional WHOIS Information Policy, Advisory

Background: ICANN’s Affirmation of Commitments requires it to “implement measures to maintain timely, unrestricted and public access to accurate and complete WHOIS information....” To do that, registrars and registries provide public access to data on registered [domain] names. Domain name registrants are required to provide accurate WHOIS contact data, and maintain its accuracy throughout the term of the registration period. (source: ICANN)

The effective date of ICANN's Additional Whois Information Policy (AWIP) and Whois advisory is 31 January 2016. ICANN has published an updated Whois advisory based on input from the community. The updated Whois advisory is intended to provide clarification for contracted parties regarding Registration Data Directory Service (RDDS) specifications of the Registry Agreement and Registrar Accreditation Agreement. RDDS specifications are also known as Whois. Registries and Registrars have until 31 January 2016 to implement the AWIP and the Whois advisory. Contracted parties will receive formal notice within the next two weeks. If you have questions or concerns, submit them to customerservice@icann.org. (source: ICANN)

2013 Registrar Accreditation Agreement: "... In responses to domain name object queries, the following fields are considered optional and should be treated as described in clarification 1: 
  • Updated Date (if the domain name has not been updated since it was created)
  • Registrant/Admin/Tech Organization 
  • Registrant/Admin/Tech State/Province 
  • Registrant/Admin/Tech Postal Code 
  • Registrant/Admin/Tech Phone Ext 
  • Registrant/Admin/Tech Fax 
  • Registrant/Admin/Tech Fax Ext 
  • Name Server"

See also:
http://whois.icann.org/en/about-whois
http://whois.icann.org/en/whats-horizonhttps://www.icann.org/resources/pages/approved-with-specs-2013-09-17-en#whois
http://tools.ietf.org/html/rfc3912