Comment by ivan_gammel

I don't think the law is ambiguous. It's usually the situation when GDPR is already violated or going to be violated and data processor wants to find the least expensive solution to reduce the risks. In other words, it's not "How we should do it?", but rather "How difficult it will be to challenge our solution X in court? What our chances to win?" THIS is ambiguous, but it's the same with any regulation.