|(a) Purpose. The purpose of these rules is to implement the requirements of the Texas Hazardous Substances Act, Health and Safety Code, Chapter 501, covering the labeling of hazardous substances. (b) Scope. These rules cover the types or classes of items which are hazardous substances and the labeling requirements, restrictions, and exemptions. (c) Federal requirements. These rules are designed to conform to and be supplemental to the applicable provisions and requirements of the Federal Hazardous Substances Act, 15 USC §1261, et seq.