Article 18 of the Vienna Convention on the Law of Treaties provides that, upon signing a treaty, a nation is “obliged to refrain from acts which would defeat the object and purpose” of the treaty “until it shall have made its intention clear not to become a party to the treaty.” The Vienna Convention thus contemplates that nations may announce an intent not to ratify a treaty after signing it.
We have to sign the Treaty before we know what’s in the Treaty....