This research aims to explain how business actors can carry out their obligations under sectoral laws and regulations without violating the Law on Prohibition of Monopoly. This objective is achieved by analyzing the findings in the cooking oil case in 2022 based on the Decision of the Business Competition Supervisory Commission (KPPU) Number 15/KPPU-I/2022. This research is a doctrinal study that applies the Monopoly Prohibition Law, Trade Law, Industry Law and KPPU Decision regarding the cooking oil cartel in 2022. This research is also the result of a comparative study of the cooking oil case in Indonesia and the rice cartel case in the Philippines. The first discussion of this research is the KPPU's view of business actors who allegedly violated Article 5 and Article 19 letter c. of the Monopoly Prohibition Law in the decisions discussed. While the second discussion suggests how the government and KPPU can work together to overcome conflicts of interest caused by the implementation of sectoral regulations. Based on the first discussion, it can be understood that KPPU views that compliance with sectoral regulations is not a violation of the Monopoly Prohibition Law. While the second discussion shows that KPPU should invite government representatives at the preliminary examination so that a case can be resolved more efficiently and effectively.