Curious detail: This was a UK choice, not an EU one. Other EU member states made it a requirement for their Parliament to agree. In the UK, the decision was taken to allow the government to override treaty scrutiny /1 https://twitter.com/johnredwood/status/1284951127507775489">https://twitter.com/johnredwo...

Thus concerning CETA, Liam Fox as Secretary of State for International Trade decided to override the scrutiny reserve resolution of the Commons. Here’s the Chair of the European Scrutiny Committee /2

The situation thus became that the UK - through its own choice - had disempowered its Parliament, while Belgium - through its own choice - had empowered even its regional Parliaments https://www.bbc.com/news/world-europe-37749236">https://www.bbc.com/news/worl...

It is worth adding that even though the UK had opted to give its Parliament less of a voice than other Member States, EU Treaty Scrutiny was still stronger than treaty scrutiny under CRAG 2010. https://commonslibrary.parliament.uk/research-briefings/sn04693/">https://commonslibrary.parliament.uk/research-...

And the missing source: the inquiry into CETA treaty scrutiny http://data.parliament.uk/writtenevidence/committeeevidence.svc/evidencedocument/european-scrutiny-committee/parliamentary-scrutiny-of-eu-trade-deal-canadaeu-comprehensive-economic-and-trade-agreement-ceta/oral/42479.html">https://data.parliament.uk/writtenev...

The author of the report (and one of the top experts on treaty scrutiny in the UK) was @Arabella_Law