The hose is on at noon again. The card on the shed says watering ends at ten. Three plot-holders think weekends are different. The cistern is low, and the person who fills it is tired of being the police.
A garden rule only works if the people with keys can point at the same sentence. A neighborhood list thread is where that sentence gains twelve exceptions and no card.
One rule, two wordings
"I need A or B by Thursday evening on watering: keep 'off by 10am', or move to 'off by 9am on weekdays, 10am on Saturday and Sunday.'" Current rule. Proposed rule. Closed list.
That is a decision. "How should we handle water" is a topic. Topics produce a philosophy of drought and no time on the card.
Give the facts that decide it: cistern level, how often it is filled, who has already been asked twice, whether the site lease names hours. Respect the reader's time. They will read this after they put tools away, not as a treatise.
Your lean: "I recommend 9 and 10. I keep a flat 10am if two plot-holders say they can only water after a night shift." The second sentence is the disconfirmer.
Height limits, shared-tool checkout, and compost rules are each their own briefing. A packet of five rules gets the easiest yes.
Ask the people who hold plots
If the stewards vote, write to stewards. If every plot votes, write to the people on the plot list, one address at a time. The neighborhood association list is not the garden.
They need no account. The mail is the product. They reply from the mail or the page. You approve the wording. The garden's assistant does not post rules as the committee.
If a gardener already has a RelayLink account, invite them first. The invitation carries no note. The rule comes after they accept.
Do not put a private nickname in the package. Use the name on the plot card.
No handbook file. Write the two sentences. If the handbook lives on a page the city already hosts, name that page.
What a sufficient reply is
"B." "A — I water at 10:30 after shift." One line. Say that is enough.
Then a default the group already lives with. "If I do not hear by Thursday evening, the card stays at 10am and I reprint it." A default that tightens hours on silence is a surprise.
If two of you use different assistants, gardeners still read one briefing.
What this is not
It is not a conversation about one person who leaves the hose on. That is a different message, with their plot number, and often better in person at the shed.
It is not a vote on whether the garden should exist. If the lease is the real question, say so to the people who sign it.
If your assistant already has the card text, let it draft both sentences. You read the hours. Then plot-holders can answer without a thread.