The main purpose of this legislative text is to express Congress's disapproval of a specific rule issued by the Environmental Protection Agency (EPA). This rule pertains to the approval of Indiana's air quality plan, specifically addressing regional haze for a designated period. The resolution aims to prevent this rule from taking effect, indicating that Congress believes the rule is not suitable or effective. Key provisions of this resolution include the formal disapproval of the EPA's rule regarding Indiana's Regional Haze Plan.