The main purpose of this legislative resolution is to formally disapprove a regulation issued by the Environmental Protection Agency (EPA) concerning the chemical Trichloroethylene (TCE). This regulation falls under the Toxic Substances Control Act (TSCA), which is a law that governs the use and management of chemicals in the United States. The resolution aims to prevent the regulation from being enforced, effectively nullifying it. The key provision of this resolution is the congressional disapproval of the EPA's final rule on TCE.