Technically, we can say no. But our politicians never do. My guess is that they do not want to step on any toes, which could make getting a sweet job in Brussels after their term ends harder.
If there is great resistance from the public after it becomes a disaster for all eu-countries it is much more likely to not go through than in an eu-country with resistance.
This law will be introduced in Switzerland, Norway and UK. Most probably UK will have to keep it after Brexit.