In theory, all EU laws should be binding on all member states. But countries can sometimes negotiate to opt-out of a particular piece of legislation. When this happens, the member state concerned is granted a “derogation” from the law. These usually only last for a limited period and are designed to allow countries extra time to adapt to a particularly onerous new law. For example, in 2013 the European Commission introduced a ban on some neonicotinoid insecticidesï»¿ however several countries such as Finaland, Romania, Germany, Latvia and Estonia have provided derogations to their farmers to keep using neonicotinoids on certain crops.