The EU`s security agreements are explicitly mentioned in the labour laws of many countries. They are heavily regulated by laws and court decisions in the United States and, to a lesser extent, in the United Kingdom.  In Canada, the legal status of the union security agreement varies from province to province and at the federal level, with some provinces allowing it but not claiming it, but the majority of provinces (and the federal government) required it when the union required it.  In June 2018, the U.S. Supreme Court ruled in Janus` favor in a 5-4 decision and stated that “states and public sector unions can no longer deduct agency fees from workers who do not consent.”  The NRL allows, under certain conditions, a union and an employer to enter into an inter-union security agreement requiring workers to make certain payments to the union in order to keep their jobs. There are different types of union security agreements. Among the most frequent, the problem of parasitism is often used to justify union security agreements. A classic study on the problem of parasitism is presented in Mancur Olson`s 1965 work, The Logic of Collective Action.  In labour relations, there is the problem of parasites, because the cost of organizing a union and negotiating a contract with the employer can be very high, and because employers will find it too expensive to take on multiple pay and benefit scales. , some or all non-union members may find that the contract is also favourable to them.  In most Western European countries, closed shops (a form of trade union security agreement) are generally prohibited, while other forms generally remain unregulated in labour law.   It is not universal; In Germany, for example, both the right to join a trade union and the right not to join a trade union are protected by law and the courts, and all forms of trade union security agreements are prohibited.
 Belgian law contains similar provisions.  Given that participation in the unemployment insurance scheme is compulsory and only trade unions have the right to manage this system, trade union membership remains high in Belgium.  Apart from North America and Western Europe, the legal status of trade union security agreements is even more different. In New Zealand, the closed store was mandatory from 1988, when a union organized the workplace.  In the Philippines, different types of trade union security agreements are authorized by labour law.  In Mexico, the closed store was mandatory until the early 1990s, when a change in federal law allowed union stores, agency stores or no agreements.   But because of the political ties between unions and the ruling party in Mexico and other ways in which Mexican law favours established unions, the closed store remains essentially the norm.  Janus v.