Other standards followed and throughout the twentieth century, particularly in the decades following the first comprehensive legislation on employment standards, additional legal safeguards were added to address several important aspects of working conditions, such as occupational health and safety, discrimination in the workplace and a specific form of discrimination, equal pay for work of equal value. For example, the precursor to the Workplace Safety and Insurance Act, Structured Compensation and Rehabilitation for Work-Related Injuries and Illnesses Introduced in 1914.  The Factory Acts (first in 1802 and again in 1833) and the Master and Servant Act of 1823 were the first laws governing industrial relations in the United Kingdom. Prior to 1960, most labour law was based on contract law. Since then, there has been a significant expansion, mainly due to the „equality movement” and the European Union. [Citation needed] Laws are either acts of parliament, called laws, statutory decrees (issued by a Secretary of State in accordance with an act of parliament) or case law (developed by various courts). All Canadian jurisdictions (federal, provincial and territorial) have minimum employment standards that apply to all employees in their province or territory. These legal minimum employment standards include things like: termination is done by dismissal or dismissal. The termination of the employment relationship is final and is mainly based on the performance or behavior of the employees, while a dismissal can be temporary and for commercial reasons. After the First World War, the Treaty of Versailles contained the first constitution of a new International Labour Organization (ILO), based on the principle „labour is not a commodity” and for the reason that „peace can only be established if it is based on social justice”.  The MAIN TASK OF THE ILO was to coordinate international labour law through the adoption of Conventions.
ILO members may voluntarily adopt and ratify Conventions. For example, the first Working Time (Industry) Convention of 1919 required a maximum of 48 hours per week and was ratified by 52 of the 185 Member States. The UK ultimately refused to ratify the Convention, as many current EU members have done, despite the fact that the Working Time Directive adopts its principles, subject to individual derogation. [c] The ILO Constitution dates back to the 1944 Declaration of Philadelphia and classified eight Conventions[d] as essential in the 1998 Declaration on Fundamental Principles and Rights at Work. In some countries with a common law background (i.e., where the law was based primarily on court decisions and customary rights rather than statutory law), the fundamental elements of the employment relationship have traditionally been governed by the common law, with most other issues left to the parties to settle by agreement. Examples of these countries are the United Kingdom and many Commonwealth countries. Termination may be found to be unlawful if: (a) the employer and employee entered into an implied contract due to the circumstances; (b) the termination of the employment relationship is contrary to public policy (i.e., the dismissal of an employee because of jury duty, military service or refusal to engage in unlawful conduct); (c) the termination violates federal, state, or local laws prohibiting discrimination; or (d) the dismissal constitutes retaliation. In France, the first labor laws were the laws of Waldeck Rousseau, which were passed in 1884. Between 1936 and 1938, the Popular Front passed a law requiring 12 days (2 weeks) of paid leave per year for workers, and a law limited the working week to 40 hours, without overtime. The Grenelle Agreements, negotiated on 25 and 26 May in the midst of the May 1968 crisis, reduced the working week to 44 hours and created trade union sections in all companies.  The minimum wage has been increased by 25%.
 In 2000, the government of Lionel Jospin introduced the 35-hour week, which was reduced by 39 hours. Five years later, conservative Prime Minister Dominique de Villepin issued the New Employment Contract (CNE). The CNE has responded to employers` demands for more flexibility in French Labour Law and has drawn criticism from unions and opponents who have said it prefers temporary work. Then, in 2006, he tried to pass the First Employment Contract (CPE) through an emergency procedure, but this was struck by protests from students and trade unions. After all, President Jacques Chirac had no choice but to repeal them. An overall comparison between Canadian and U.S. labour and employment laws also shows a considerable degree of similarity. However, a key difference between the two countries is that there is no doctrine of „employment at will” in Canada. As a rule, employees do not have to be fired at will.
If the employer is covered by warn, insured employees must be dismissed at least 60 days in advance. The WARN is applicable if the employer has 100 or more employees and closes a workplace or makes a collective redundancy. A workplace closure occurs when the employment relationship of 50 or more employees is terminated for a period of 30 days. A mass layoff occurs when 500 or more employees lose their jobs in a 30-day period, or 50 to 499 employees lose their jobs and make up 33% or more of the company`s active workforce. .