There can be big differences between the fact that a contract is an uncon concluded agreement or that it is simply unenforceable. The difference increases the complexity of an already difficult task to assess your legal situation, your rights and your potential liability. The LJ laws recognized that illegality and contract law were a „notoriously concluded area.“ In general, a distinction had been made previously between cases where the culprit intended to provide illegal services from the date of the contract`s conclusion and cases where the intention to be illegally issued had not been taken until later. The law on illegality with respect to business contracts is governed by the common law. The common law takes into account all statutes for the assessment of illegality. Previously, the court used a rules-based approach to assess the illegality and consequences of public order. .13 When assessing the significance of an unlawful act brought to his attention, the examiner should take into account the both quantitative and qualitative relevance of the act. For example, an illegal payment of an otherwise intangible amount could be essential if there is a reasonable possibility that it could result in a potential material liability or a substantial loss of revenue. The Case of David Taylor – Son v Barnett Trading Co  gives us the example of a contract considered illegal at the time of its creation.
In this case, Barnett Trading agreed to sell David Taylor Irish Steak for delivery between April and July at a specified price. At the time of the contract, a contract prevented the purchase or sale of meat at a certain price (exceeded by the contract) was in effect. When Barnett Trading did not deliver, Mr. Taylor sought damages. At trial, the arbitrators ordered Barnett Trading to pay Mr. Taylor compensation for non-delivery. During the appeal process, the Court of Appeal found that the contract was illegal at the time of its establishment, since the prices set had exceeded legal limits, and therefore quashed the award on the basis of an illegal contract. The seriousness of the illegality plays a role, with the knowledge of the parties when the contract was concluded.