MK: the CAA is a regulator, their task is to ensure organisations and individuals comply with the Law. They cannot make Law or grant exemptions to EU Regulations; they can issue exemptions to some parts of the UK ANO where safety is not compromised.
It seems they are now well outside the box and making it up as they go along.
Nobody is disputing the concept of a Medical Dec, just the way they are going about it, which ultimately leaves the individual in a position where a court could rule they are acting unlawfully, with all associated consequences.