Learning foreign languages is thought at present to be one of the most interesting investments. Time spent on learning inter alia English, Spanish or Chinese is known to be pretty worth it. It is so, because thanks to increasing impact of for instance globalization and worldwide popular organizations we are given with an attractive opportunity to find more post offers for people, who are able to speak fluently in an other language.

Some countries have established unusual rules concerning items which are allowed to import the state and those which are forbidden. The aim of introducing such guarantees makes sure the authority that all imported items to the state meet some norms. Why have the states introduced such guarantees?