Common Law has developed with changing business conditions. Thus, in the case of Rogers against Parry, in the early seventeenth century, it was found that a promise by a carpenter not to act from his home for 21 years was enforceable against him, because the time and place were safe. It has also been found (by the head of Justice Coke) that a man cannot undertake not to use his profession in general. Although the limitation of commercial doctrine is still valid, the current use has been limited by modern and economic competition law laws in most countries. It remains of considerable importance in the United States, as does the Mitchel vs. Reynolds case. For example, a manufacturer may develop an agreement with a distributor to limit its service space to a specific domain. From a technical point of view, this is a restriction on trade, but it is considered appropriate because it has a legitimate aim and is not contrary to the public interest. The following questions were raised in Vodacom (Pty) Ltd v Motsa and Another (J 74/16)  ZALCJHB 53. Vodacom successfully enforced an executive`s contract that provided for six months` notice and a trade restriction for an additional six months after the notice period. The original case, which established the concept of trade restriction, was in England in the 1890s. Arms manufacturer Thorsten Nordenfelt had sold its business and both sides agreed that the seller “would not produce weapons or ammunition anywhere in the world and would not compete with Maxim in any way for a period of 25 years.” The case was heard by the House of Lords, who said you can search your state`s legal code to see how the state sees restrictive agreements in non-compete agreements and other restrictive agreements. In basson/Chilwan and others in 1993 (3) SA 742 (A), the Court of Justice established a test consisting of four questions: Defining the trade restriction is something you can do to better understand situations in which you are not able to act as usual because of the actions of another party.
You should also be aware of this practice if you are preventing another company or person from carrying out certain business activities. In order to be legal, a trade restriction, determined on the basis of a number of considerations, should be considered appropriate. There are also illegal trade restrictions such as territorial constraints and boycotts. A court must make a value decision taking into account the two main political considerations regarding the determination of the adequacy of a trade restriction clause. The courts have found it inappropriate to limit trade agreements in cases where they are too vague or too broad.