Notwithstanding any other provisions of this chapter, the commission may approve a tariff mechanism for the automatic annual adjustment of charges for the jurisdictional capital costs and operating expenses incurred by a public utility for environmental improvements to its existing electric generation facilities. For the purposes of §§ 49-34A-97 to 49-34A-100, inclusive, environmental improvements include any requirements under the Clean Air Act, the Clean Water Act, or any other federal law or rule, or any state law or rule implementing a federal law or rule, or voluntary environmental measures designed to protect the environment.
SDCL 49-34A-97