IAB
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... document. Other terms, including "IESG," "ISOC," "IAB," and "RFC
Editor," are defined in [RFC2028].
...
... initiated by ISOC, the IESG or the IAB under the general
designation of the Internet Engineering Task Force or IETF ...
... IESG, or any member thereof on behalf of the IESG,
o the IAB or any member thereof on behalf of the IAB,
...