Finally, this type of clause, common in American contracts, establishes that certain matters remain valid even after the termination of the contract. Examples include so-called non-compete and confidentiality clauses that would continue to have effect even after the conclusion of the contract. However, such clauses can be seen, under our law, as accessory agreements to the main contract. In other countries, parties sometimes use these survival clauses to extend the term of certain contractual obligations, which may conflict with our legal system, which has inflexible rules of public order regarding limitation periods. Therefore, depending on the matter, eventual clauses may be invalidated in court.