Paul the Wolf
Former Score Predictions Comp Organiser (now out)
technically I think both sides are responsible for the implementation? - I believe there is an obligation on both sides to perform customs checks isnt there?
https://fullfact.org/europe/eu-referendum-and-irish-border/
But yeah as they struggle for a deal till December? it will leave 3 months or so and as you say nobody wants to be seen to do anything as its admiting the talks cant work - and then in 3 months I'm sure it will be difficut / impossible to put anything in place (technology or sufficient infra to allow for checks and queues etc)
If one ignores the GFA and extra problems in Ireland in effect it should be the same as the UK/French border with infrastructure on both sides and have the same checks.