The State shall develop plans, adopt regulations, and implement programs that reduce statewide greenhouse gas emissions in accordance with this subtitle. On or before June 30, 2023, the Department shall: Submit a proposed plan that reduces statewide greenhouse gas emissions by 60% from 2006 levels by 2031 to the Governor and General Assembly; Make the proposed plan available to the public; and Convene a series of public workshops to provide interested parties with an opportunity to comment on the proposed plan. The Department shall, on or before December 31, 2012, adopt a final plan that reduces statewide greenhouse gas emissions by 25% from 2006 levels by 2020. The Department shall, on or before December 31, 2023, adopt a final plan that: Reduces statewide greenhouse gas emissions by 60% from 2006 levels by 2031; and Sets the State on a path toward achieving net–zero statewide greenhouse gas emissions by 2045. The Department shall: On or before December 31, 2030, adopt a final plan that achieves net–zero statewide greenhouse gas emissions by 2045; and On or before December 31, 2035, review and, as necessary, revise the final plan to achieve net–zero statewide gas emissions by 2045. The final plans required under subsection (c) of this section shall include: Adopted regulations that implement all plan measures for which State agencies have existing statutory authority; and A summary of any new legislative authority needed to fully implement the plans and a timeline for seeking legislative authority. A final plan developed under this section: May not include highway widening or additional road construction as a greenhouse gas emission reduction measure; May include the use of carbon capture, electric distribution and transmission infrastructure improvements, and storage technology as a greenhouse gas emission reduction measure only if the technology has been scientifically proven to achieve verifiable carbon reductions; Shall use the global warming potential for methane over a 20–year time horizon, as accepted in the most recent assessment of the Intergovernmental Panel on Climate Change, in estimating the State’s greenhouse gas emissions reductions; Shall include policy recommendations to ensure the continued operation of Maryland’s existing zero carbon emission electric generators through current operating licenses; Shall include specific estimates of the greenhouse gas emissions reductions that could be achieved through the expansion of mass transit options; and Shall include specific estimates of the reductions expected from each greenhouse gas emissions reduction measure included in the plan. In developing and adopting a final plan to reduce statewide greenhouse gas emissions, the Department shall consult with State and local agencies as appropriate. Paragraphs (2) and (3) of this subsection apply only to persons who engaged in manufacturing in 2023. Unless required by federal law or regulations or existing State law, regulations adopted by State agencies to implement a final plan may not: Require any manufacturer to reduce greenhouse gas emissions below the emissions levels for that manufacturer in 2023; Cause an increase in costs to a manufacturer that are significantly beyond the costs that were incurred by that manufacturer in 2023; or Require any manufacturer that is engaged in the creation of renewable energy components or technology aimed at greenhouse gas emissions reductions to reduce greenhouse gas emissions. Subparagraph (i) of this paragraph may not be construed to exempt greenhouse gas emissions sources in the State’s manufacturing sector from the obligation to comply with: Greenhouse gas emissions monitoring, recordkeeping, and reporting requirements for which the Department had existing authority under § 2–301(a) of this title on or before October 1, 2009; or Greenhouse gas emissions reductions required of the manufacturing sector as a result of the State’s implementation of the Regional Greenhouse Gas Initiative. A regulation adopted by a State agency for the purpose of reducing greenhouse gas emissions in accordance with this section may not be construed to result in a significant increase in costs to the State’s manufacturing sector unless the source would not incur the cost increase but for the new regulation. As part of the consideration of any regulation of the production of cement under this section, the Department shall consider: The extent to which cement manufacturing is an energy intensive and trade exposed industry; Credit for early action investments made by cement producers to reduce emissions or for the manufacturing of alternative materials that result in greenhouse gas emissions reductions; The adoption of policies that encourage, facilitate, and offer financial incentives for the use of alternative fuel sources; The availability and cost of mature greenhouse gas abatement technologies; and Advancing policies that provide financial incentives to offset the costs of installing and transitioning to greenhouse gas emissions abatement technologies, including the manufacturing of materials and technology that results in greenhouse gas emissions reductions. In considering the feasibility of regulation and the items under paragraph (1) of this subsection, the Department shall consult with impacted cement producers and other stakeholders.