The law does not recognize any contract – or agreement – to enter into a contract in the future. It has no binding effect, because supply and acceptance do not exist. In other words, what are the terms of the offer? Acceptance is done by the final and unqualified approval of an offer, the acceptance of the precise terms of the offer without modification. Many agreements have obligations for other parties to enter into another agreement in the future, the terms of which are not always secure at this stage. In January 2016, the Court of Appeal again questioned the implementation of such an agreement. It could be otherwise if the parties agree to enter into some form of contract – which contains the approval of all the specific conditions necessary to conclude a contract in the future. If the law has requirements for one type of contract, they are usually that the agreement is registered in writing and signed by one or both parties or their agent. Some arbitration clauses are unenforceable and, in other cases, arbitration may not be sufficient to resolve a dispute. For example, disputes over the validity of registered intellectual property rights may be settled by a public body within the national registration system.
 In the case of matters of significant public interest that go beyond the narrow interests of the parties to the agreement, such as allegations that a party breached a contract by committing unlawful anti-competitive conduct or committing civil rights violations, a court may find that the parties may assert one or all of their rights before contracting out.  Written contracts may consist of a standard form agreement or a letter confirming the agreement. Each country recognized by private international law has its own national legal system to govern treaties. While contract law systems may have similarities, they can differ significantly. As a result, many contracts contain a choice of law clause and a jurisdiction clause. These provisions define the laws of the contracting country and the country or other forum in which disputes are settled. Without explicit agreement on such issues in the treaty itself, countries have rules for determining treaty law and jurisdiction over litigation.