Here, let’s keep it as simple as possible.
Just 3 hurdles.
Or if you prefer, you can go straight to @DmitryOpines' colourful thread
1/7
Yes, GATT Art.24.5 has a 10-yr “reasonable length of time” for interim agreements
Note "agreement".
2/7
wto.org/english/docs_e…
In other words
1. There has to be a deal of some kind
2. The EU would almost certainly insist on a Withdrawal Agreement and backstop
If this is agreed, then no need for an interim agreement at all. But let's continue
3/7
The UK and EU have to agree on details and present a plan and timetable to the WTO's membership.
4/7
Source: tradebetablog.wordpress.com/2018/12/27/myt…
The UK and EU would have to accept the changes or scrap the interim agreement. GATT Art.24.7
5/7
wto.org/english/docs_e…
If the UK and EU can agree, it's simpler to continue with the present customs union (or whatever) until it's replaced. If they can't, there's no interim deal either.
6/7
Full explanation: tradebetablog.wordpress.com/2018/12/27/myt…
The full legal text👇🏽of GATT Article 24, with additional understandings and jurisprudence,
And please don't call it WTO Article 24. It doesn't exist.
7/7
wto.org/english/res_e/…