The product of a convention would also require ratification by 38 states.
After that date constitutional amendments would require ratification by way of public referendum before they could come into force.
But it requires ratification by all 12 community members to come into force.
To enter force, the document requires ratification by 35 countries, but as of 2013 has received only 30 ratifications.
Treaties with foreign countries require ratification by the Diet.
The selection requires ratification at a commission meeting next month to become final.
The agreement still requires ratification by the union members.
The deal still requires ratification by the union members, who will vote over the weekend.
The contract requires ratification by the union's 2,400 members.
Neither would another Treaty be required, or renewed ratification.