A bill to amend the Occupational Safety and Health Act of 1970 to provide adequate protection of employees by guaranteeing their right to know of the risks associated with hazardous substances in their places of employment by permitting States to adopt more protective provisions of law regarding the providing of information to employees concerning these risks.

Amends the Occupational Safety and Health Act of 1970 (OSHA) to permit States to adopt more stringent right-to-know standards than those under OSHA.

Permits any State to adopt any requirement (including any labeling requirement) requiring information to be provided to employees concerning hazardous substances to which they may be exposed in the course of their employment if: (1) such State requirement is more stringent than the OSHA standard in effect which relates to the same issue; or (2) there is no OSHA standard in effect relating to such issue. Treats a State requirement as more stringent than the OSHA standard if it: (1) requires more information to be provided to employees; or (2) is otherwise more effective in providing safe and healthful employment and places of employment.

Provides for the separability of individual requirements for purposes of determinations under this Act.

Requires compliance both with a more stringent State requirement and with the OSHA standard which relates to the same issue. Provides that, where compliance with both standards would be physically impossible, compliance with the OSHA standard shall not be required.

Makes the provisions of this Act applicable in all States without regard to whether a State plan has been submitted, approved, or disapproved.