Starting in 2018, 18 percent of U.S. workers who argued by 38 percent of workers. [when?] In 2018, 14% of non-graduate workers were covered by non-competition rules, while higher-wage employees were more likely.  In March 2019, the U.S. Federal Trade Commission came under pressure from politicians, unions and interest associations to ban non-competition bans. One petition has estimated that one in five American workers – or about 30 million – is linked to such an agreement.  Non-competition prohibitions are applied in Illinois where the agreement is an ancillary relationship (employment, sale of a business, etc.) and (1) must not be greater than what is necessary to protect a legitimate business interest of the employer (2) to which the worker cannot impose unreasonable severity and (3) cannot harm the public.  Although reasonable restrictions in the space and time of the non-competition agreement are not expressly imposed by law, they tend to be seen as a measure of the extent of the non-competition obligation greater than what is necessary to protect the legitimate commercial interest of the employer.  A non-compete agreement is a formal agreement between an employer and a worker to ensure that the worker does not engage in employment activities in conflict or in competition with his or her main activity. Companies use non-competition measures to ensure that their employees do not engage in activities that may reduce the company`s market share.
A standard non-competition agreement is a formal agreement between the employer and the worker which stipulates that the worker will not engage in employment activities in competition or in conflict with his or her main work. Already in Dyer`s case in 1414, the English common law decided not to enforce the prohibitions on non-competition, as they were by nature trade restrictions.  This prohibition remained unchanged until 1621, when a restriction limited to a given geographical site was established as an exception to the previously absolute rule. Nearly a hundred years later, the exception became the rule in Mitchel v Reynolds of 1711, which provided the modern framework for analyzing the possibility of a non-competition clause.  Canadian courts will apply competition and non-appeal agreements, but the agreement must be limited in the time, scope and geographic scope of the agreement to what is reasonably necessary to protect the company`s property rights, such as confidential business information or customer relations and the scope of the agreement must be clearly defined. Shafron v. KRG Insurance Brokers (Western) Inc. 2009 CSC 6 of the Supreme Court of Canada found that a non-competition agreement was inconclusive because the term “Metropolitan City of Vancouver” was not definitively defined.  At the end or expiry of the employment contract, the duration of non-competition in the above clause may not exceed two years for persons who work, manufacture or deliver products of the same category to another employer or who engage in an activity of the same category as that employer.
The non-competition clause is a widely used contractual obligation in the commercial world, valid and applicable to different types of contracts, whether or not they are governed by labour law, commercial law and even the rules on cartels and abuse of dominant position.