Unverifiable: 'A Convention Enters Force After Two Countries Ratify It' — There Is No Single Rule
“The convention comes into force 12 months after two countries ratify it”
The argument in brief
The claim that a convention comes into force 12 months after two countries ratify it cannot be confirmed or denied because it doesn't name a specific convention. Entry-into-force rules vary enormously across treaties — major ones like the Paris Agreement required 55 countries, and the Rome Statute required 60. There is no universal standard of 'two countries and 12 months.'
Why it spread
Most people have no reason to read treaty law, so a confident-sounding procedural rule goes unchallenged. The specific numbers — 'two countries' and '12 months' — give the claim a false air of expertise, making it easy to repeat and hard to immediately dispute without knowing where to look.
The claim states that a convention becomes legally binding 12 months after two countries ratify it. The problem is that no specific convention is named — and without that, the claim is impossible to verify. It also happens to describe rules that are atypical of how most international treaties actually work.
Every international convention sets its own entry-into-force conditions, written into the treaty text itself. The Vienna Convention on the Law of Treaties, for example, required 35 ratifications and then waited just 30 days. The Paris Agreement needed 55 countries representing 55% of global emissions, followed by another 30-day delay. The Rome Statute, which created the International Criminal Court, required 60 ratifications before it could take effect.
According to the United Nations Treaty Collection, the time delay after a ratification threshold is met is most commonly 30, 60, or 90 days — not 12 months. A 12-month delay is unusual and would need to be specified in the treaty itself. The 'two countries' threshold is also rare outside of bilateral agreements between just two nations.
To be fair, some treaties do use low ratification thresholds. A bilateral treaty — one negotiated between exactly two countries — could logically require both parties to ratify it. But even then, the 12-month timeline would need to be written into that specific agreement. Applying any single formula to all conventions is simply wrong.
This kind of claim spreads because treaty law is unfamiliar territory for most people. A statement that sounds precise — two countries, 12 months — feels authoritative even when it isn't grounded in any particular document. If you see a claim like this, always ask: which convention, specifically? The answer is always in the treaty text itself.
Sources
- Vienna Convention on the Law of Treaties (1969)
Article 84 of the Vienna Convention on the Law of Treaties states it enters into force on the thirtieth day following the date of deposit of the thirty-fifth instrument of ratification or accession — not two countries and not 12 months.
- United Nations Treaty Collection — Entry into Force Clauses
Different treaties have widely varying entry-into-force thresholds. Some require a specific number of ratifications (e.g., 20, 35, 55), some require ratifications by specific states, and the time delay after the threshold is met also varies by treaty — commonly 30, 60, or 90 days, not always 12 months.
- Paris Agreement (2015)
Article 21 of the Paris Agreement required ratification by at least 55 parties accounting for at least 55% of global greenhouse gas emissions — a much higher threshold than two countries, with a 30-day delay after the threshold was met.
- Rome Statute of the International Criminal Court
Article 126 of the Rome Statute required 60 ratifications and entered into force on the first day of the month after the 60th day following the 60th ratification — again, far more than two countries and a different time delay.