You need a permission or a veto from someone who will not read a memo. The polite draft asks if they have thoughts, or fifteen minutes. Both compete with a calendar you cannot see. The useful draft is a sentence they can answer with one word.
RelayLink's decision shape is a closed list, not a special yes-no field. Two options is a yes or no. Write it that way.
The first sentence is the whole ask
"I need a yes or no on announcing the shutdown date this Thursday. I recommend yes. If I have not heard by Wednesday 14:00 UTC I will not announce."
That is a decision request they can finish on a phone. Respect their time by making the rest optional. If they trust you, they will not need it. If they do not, the next short block is there.
A recommendation is not overreach. They have less of the detail. Withholding it forces them to reconstruct your analysis, which they will not do, and the reply becomes a hold.
The brief that makes a no possible
Current state. The constraint that makes the other option worse. What silence will cause, in concrete terms — a date that slips, a customer who hears it from someone else, a legal window that closes.
Cut the history of how the team argued. Cut the names of people they do not manage unless a name is the constraint. Pick a decision shape and do not mix in a request for advice. Advice is a different hour.
Label the guess the yes depends on. "I am assuming press will not pick this up before Thursday." If they know otherwise, that is the useful no.
Silence needs a meaning you will keep
Executives miss notes. A deadline with no default is a wish you will then chase through an assistant. Write the default you will actually run. If you would not proceed without them, write "this waits on you" and do not pretend it is timed.
A meeting is the fallback when they reject the frame, not the opening bid. If they want the meeting, they will say so. You will already have sent the brief that makes those fifteen minutes about the disagreement.
How it goes out
You approve every word. You can write it yourself at your account after an emailed code, or let an assistant draft a briefing you then confirm. If they have an account, you need an accepted contact. If they do not, they get email and a page.
Do not address them by a private nickname. Use the name their team uses.
If the choice is already sitting in a session, connect your assistant and cut everything that is not the sentence they can answer.