Sources
Two-source rule
A source is a named issuer and a dated document we can open: a bulletin, a filing, a court list, a vendor advisory, a register entry. A journalist’s recap can point us to that document. We still open the filing itself.
When only one document exists, the item can still run if the issuer is the authority on that fact. We mark a line unconfirmed when a second expected paper has not appeared, or when two offices disagree on the date or the scope.
Unconfirmed items never take the top slot. They sit lower, with the gap named in the sentence, so a reader can decide how much weight to give them.