This document can be used when a client wants to hire an executor for a specific service. Performance agreements can be quite complex, as the relationship between the parties must be clearly defined. From performance royalties to special effects included, everything must be spent on these agreements. Often, performers have specific requirements for their own show (things like lighting and music) and the details of the person making these objects available, as well as the objects that are allowed, are a big part of the performance agreement. A good performance agreement will also be covered by both parties in the event of a problem: clauses such as a limitation of liability and a selection of existing legislation should be included. A delivery contract is a document intended to be used when a person or company (the customer) wishes to assign another person or company (the artist-exporter) to execute it at a given location. Performance agreements can be used either if the exporter is the main event or if the exporter has agreed to perform at another event. Performance agreements in the United States are governed by general treaty principles that can be governed by national and federal law.