The Ponsonby Rule was a constitutional convention in United Kingdom constitutional law that dictated that most international treaties had to be laid before Parliament 21 days before ratification. On 11 November 2010, Part 2 of the Constitutional Reform and Governance Act 2010 was brought into force by a commencement order. It provides for the ratification of (non-EU) treaties and puts parliamentary scrutiny of treaties on a statutory footing. This changed the convention into a provision having legal force.