The bill amends the Clean Air Act to impact the production and distribution of gasoline-ethanol blends, especially concerning E15 fuel dispenser labeling requirements, and underground storage tank regulations. The bill also modifies compliance requirements for small refining companies, defining and granting exemptions for at-risk qualifying small refineries. Notably, it adjusts compliance requirements, generates credits under the renewable fuel program, and prohibits the reallocation of obligated volumes for small refining companies. Additionally, it allows small refineries to petition for exemptions and limits exemptions in terms of renewable fuel obligations. The Environmental Protection Agency is required to finalize a rule related to these regulations within 18 months.