NCGS, Chapter 95, Article 18 - Identification of Toxic or Hazardous Substances.. Provides for the Hazardous Chemicals Right to Know Act. It includes definitions, and requirements for the compilation of a hazardous substance list and safety data sheets, labeling, emergency information, complaints, investigations, and penalties, employee rights, trade secrets, medical emergencies and non-emergencies, community right to know, exemptions and preemption of local regulations.