To be horribly pedantic about it, they haven't actually implemented the decision because the decision hasn't formally been enacted yet. (Decision is actually a technical term in European Union law – EU legislative acts can be classified as directives, regulations, decisions, or recommendations. I'm not sure in this case what type of legislative instrument they are going to use – it could be either a regulation or a decision, it won't be a directive or a recommendation.)

They've just decided to do the same thing independently while they wait.