W. Va. Code § 22-5-20
The West Virginia Department of Environmental Protection shall propose a legislative rule for promulgation in accordance with §29A-3-1 of this code to implement the Affordable Clean Energy rule, consisting of Emission Guidelines for Greenhouse Gas, Emissions from Existing Electric Utility Generating Units (EGUs) pursuant to the federal Clean Air Act, section 111(d). The proposed rule shall be filed with the Secretary of State in time for consideration during the 2021 legislative session. Notwithstanding any provision to the contrary, the agency shall submit a complete or partial state compliance plan to the federal Environmental Protection Agency no later than September 1, 2020, which may be comprised of one or more EGU facilities that are voluntarily prepared to move forward with a compliance plan for one or more of their EGUs.
W. Va. Code § 22-5-20