Toxic Chemical Substances Control Act (TCSCA) is the most important chemical control law in Taiwan. It has undergone six amendments since its first promulgation in 1986. The last amendment was made in 2013 and implemented the core principle of chemical registration. However, after promulgation a number of high profile chemical accidents occurred, prompting the government to revise the Act again with a view to better management of chemicals throughout the supply chain. The revised Act is renamed the Toxic and Concerned Chemical Substances Control Act (TCCSCA), which entails a broader control over chemicals.