Procurement mediation comprises disputes between a public body and a private body. In common law jurisdictions only regulatory stipulations on creation of supply contracts that derive from the fields of State Aids (EU Law and domestic application) or general administrative guidelines extend ordinary laws of commerce. The general law of contract applies in the UK accordingly. Procurement mediation occurs in circumstances after creation of the contract where a dispute arises in regard to the performance or payments. A Procurement mediator in the UK may choose to specialise in this type of contract or a public body may appoint an individual to a specific mediation panel.