This isn't entirely correct. The basic idea that countries are only bound by treaties they agreed to (or laws that flow from those treaties, e.g. if they give t

This isn't entirely correct. The basic idea that countries are only bound by treaties they agreed to (or laws that flow from those treaties, e.g. if they give the EU parliament legislative power in some areas) is right. However, some laws might be in breach of existing treaties (like the ECHR) that the countries previously signed. That might very well be the case i.c. If so, the (part of the) law that is in breach is void until the treaty is changed (which is unlikely in most cases).