I.
The union's members is equal in the Union.
II.
The members of the union is obligated to help the other nation(s) if the other is attacked by another country.
If the country of the union is the attacker, it will need the confirming of the council (see III) to attack a country.
If this confirming is not granted, the nations in the union is not obligated to help out the attacker nation.
III.
There will be a council, with representives from each country.
There will be votings for things that needs to be voted for (see this treaty).
If a new nation want to join the Union, it must be allowed by ALL members, if not, it can't be accepted.
Each country have one representive.
Each nation have one vote.
If the vote ends with a draw, nothing happens until there is an agreement.
The council has its seat in Bucuresti. It will only be moved if found neccasery.
IV.
Each of it's members can have trade agreements with countries outside of the Union. Boycotts between the member nations is not allowed. Neither any other kind of agression.
V.
If a nation decides to dishonour this union in war, it will give the other members a Casus Belli, or Reason of War, against the nation that dishonoured the Union for 9 months (three turns). If the nation had a good reason for not joining the alliance, it may be forgiven, and accepted back in the Union. This will be decided by the Council.
VI.
Royal Marriages are well wanted between the members, but is not enforced upon anyone.
When a nation joins the union, it must sign and agree this pact.
If a country ever breaks one of these terms, their faith will be decided by the council.