Other provisions of the union shop are subject to various requirements that the union promotes for “peace of work”, such as for example. B the compulsory conciliation of all disputes and the waiver of the right to strike.  Vatican lay employees are members of a trade union shop, the Vatican Association of Lay Workers, making the Vatican the most trade union sovereign state in the world. Union store, an agreement obliging employees to join a given union and pay dues within a set period of time after the start of employment – usually 30 to 90 days. Such regulation ensures that workers pay the benefits of union representation. A union shop is less restrictive than a closed shop that prevents employers from hiring outside the union. The status of union store can also be challenged by its members.