Brief Analysis and History of Single Market

If you have some basics about trade, you are aware of various constraints which are brought about by different trade barriers between nations. Governments are contributing billions of dollars trying to come up with a way of dong away with these obstacles through having a common single market.
Economic leaders and advisors are aware of the numerous benefits which can be realized if this idea is actualized to the fullest.This is the idea behind the formation of EU, which was born to make it easy to trade between London and Lisbon and between London and Liverpool. In most circumstances, you will also hear the single market being referred to as the internal market. Learn more about  EU customs union, go here. 
What and why a single market? First, its rules advocate for free movement of four "freedoms" namely goods, services, people, and capital, from one EU member to the other. These rules take two forms. First, they focus on doing away with the trade barriers and second, harmonize or unify national regulations at European Union level. Find out for further details on  EU customs union right here.

Have a quick scan what is all about removing barriers to trade. This idea traces its history in 1957 from original EEC Treaty. The treaty provisions advocated for the removal of obstacles of the four "freedoms." It is only in exceptional cases like public security, public policy and public health that national rules will be allowed to take effect. An example of this is where France, which produces great Cassis de Dijon, a blackcurrant liqueur, which has an alcohol content of 14-20%. On the contrary, the Germany law requires every fruit liqueur to have not less than 25% alcohol content. The influence of the German law was to keep off rival products from France. This may have pleased German manufacturers, but on the other side, it was bad news for France. It also denied German consumers the happiness of French creme de cassis. As a result of this, the EU court ruled out that German law was affecting and interfering with the free movement of goods. This is because it stopped French's cassis, which was produced legally in France to find its way to the German market. Germany did not take that seated; it argued that its citizens were getting drunk because they were not aware of how potent the French product was. However, the court was not convinced and termed German rule to be against, and it was removed.