[1] IETF Trust Workspace http://trustee.ietf.org/

[2] Trust Legal Provisions (TLP)Documents ( (2011-02-01 04:09:09 +09:00 版)) http://trustee.ietf.org/license-info/

[3] IETF Trust (2010-03-25 07:54:59 +09:00 版) http://trustee.ietf.org/