Business competition is an economic instrument in the development of the Indonesian economic system, as evidenced by the enactment of Law Number 5 of 1999 concerning the Prohibition of Monopolies and Unfair Business Competition. The issues discussed in this study are: what forms of agreements are prohibited in business competition activities according to Law Number 5 of 1999 concerning the Prohibition of Monopolistic Practices and Unfair Business Competition, and what are the responsibilities of business actors involved in cases of monopolistic practices and unfair business competition according to Law Number 5 of 1999 concerning the Prohibition of Unfair Business Competition. The data collection method in this study was conducted through library research and document review. This involved collecting legal materials through journals, legal research results, and various official institutional documents such as laws and regulations, court circulars, and other literature relevant to the research problem.
                        
                        
                        
                        
                            
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