MO HB1631

Requires the Air Conservation Commission to develop carbon dioxide emission standards through unit-by-unit analysis of each existing affected source, analyzing each generation plant individually rather than collectively.

Mandates the commission consider the remaining useful life of each existing affected source when developing and implementing emission standards, consistent with federal law (42 U.S.C. Section 7411(d)).

Requires the commission to consider overall economic impact from emission standards and compliance schedules when fulfilling its duty to prevent and control air pollution through commercially available and economically feasible methods.

Allows the commission to develop less stringent standards or longer compliance schedules on a unit-by-unit basis based on unreasonable control costs, physical impossibility of installing equipment, or other factors including plant closure impacts, job losses, and disproportionate rate impacts on low-income populations.

Confirms the commission has legal authority to implement state implementation plans with emission standards and compliance schedules developed under this provision and includes a severability clause.