It's a good idea to share the 0SH rules, although it seems meaningless to repeat them every month as they almost never change.
Here they are:
0SH rules
When two alliances that both have the 0SH tag set before the war search started are matched, they will war with the following rules of engagement.
It is recommended to always contact the other team to confirm the rules.
1) Do NOT donate any troops to the Stronghold on the war map for defense.
2) Do NOT use Elephant troops (Archers, Seige, etc.) during war offense/attack.
3) Bazooka tower or bazooka sentry to be moved to the edge of the map.
Further Clarification
0SH TAG
In order to identify your alliance as participating in the scheme, your alliance must use the "0SH" in the alliance motto, and optionally in the alliance name (to aid visibility for unsearchable alliances, and make it easier to identify a 0SH match)
RULE 1
Whenever alliances with this tag meet each other, there will be NO defensive troop tactics in strongholds either side.
Accidental donations should be rectified ASAP by contacting the opponent and arranging terms.
These terms may include matching the accidental donations, or agreeing to play non-0SH for this war.
RULES 2 & 3
Troop Tactics can be used in attacks at either alliance's discretion, except for Elephants.
Zooka tower or sentry to be placed on the edge of the map for quick destruction.
OPTIONAL EXTENDED ARRANGEMENTS
Optionally, alliances can choose to take it to the next logical level, and use only two cards per attack, or no cards at all (attack or defense) or even choose to use no coalitions.
A list of alliances interested in going that bit further can be identified in the contact list with [2TT] or [0TT] next to the contact name.
BREACHING THE RULES
In the event of accidental stronghold donations, or use of elephants troops on offense, a representative of the offending alliance should contact the other to arrange terms to even out the mistake.
The same goes for any breach of extended arrangements.
In the first instance, every attempt should be made to resolve disputes in a friendly way between the alliances involved, before being brought into a public forum.
BLACKLIST
Any alliance found to be abusing the tags, or failing to satisfactorily resolve accidental donations/attack cards shall be added to a blacklist maintained in this group.
Any match against a blacklisted alliance should proceed as if they are not in the scheme.