Even in this case if I remember correctly there was a version of it implemented in 2016, it is a strange edge case though which would endanger the EEC agreement

Even in this case if I remember correctly there was a version of it implemented in 2016, it is a strange edge case though which would endanger the EEC agreements already in place between the EU and CH. This specific case of the Credit Suisse doesn't appear (to my as a layman) to be in contention of anything external to CH.