RFC 6335, "Internet Assigned Numbers Authority (IANA) Procedures for the Management of the Service Name and Transport Protocol Port Number Registry", August 2011Source of RFC: tsvwg (tsv)
Errata ID: 4999
Reported By: Mark Nottingham
Date Reported: 2017-04-19
Throughout the document, when it says:
HOLD FOR UPDATE
Many port number assignments are to individuals, but the document does not
contemplate how they should be handled when the assignee is dead or
otherwise can't be contacted.
The most obvious procedure to follow is a transfer (8.5), but that requires
de-assignment (8.2), and that doesn't cover the case above.