Indiana is among the “state-plan” states; that is, those states that have adopted appropriate laws and regulations, and have gained approval from federal authorities. Indiana operates its own Indiana Occupational Safety and Health Act, administered and enforced by the Department of Labor and applying to both private and public sector workplaces. The state has adopted the federal OSH Act standards, including the Hazard Communication Standard, in their entirety--but if the state labor department believes an emergency standard is necessary in order to protect employees from dangerous exposure to hazardous substances, it may promulgate emergency standards (IN Code Sec. 22-8-1.1et seq.; IN Admin. Code Tit. 620 Sec. 1-1-24 et seq).
There is additional information and a discussion of the federal OSH Act and worker right-to-know regulations.