I submit a proposed annotation for rule 2350 to Jason, the rulekeepor:
CFJ 3868 (called 12 Jul 2020): Referring to undefined entities in
conjunction with the term "proposal" in a proposal-like text can render
the text insufficiently unambiguous, such that a public message
containing it fails to create a proposal by announcement. Additionally,
if a CFJ is called to resolve whether a proposal was created by
announcement, this occurrence can be an indicator of ambiguity in the
action's specification.