The bill HB2646 introduces new regulations for public service corporations and public power entities regarding the closure, decommissioning, or disposal of electric generation facilities. It mandates that such entities cannot initiate these processes within five years after providing written notice to various state officials and committees. Additionally, the bill requires these entities to provide detailed information about the decision to close or decommission, including the reasons and plans for replacement power.

The bill also allows for the conversion or repurposing of existing electric generation facilities to use different energy sources and the installation of emission reduction controls. It obligates entities to inform the Attorney General and other state authorities if federal laws or regulations may force the retirement of their facilities, allowing for state action to defend Arizona's interests. The bill includes legislative findings emphasizing the importance of affordable and reliable energy and asserts state sovereignty over energy facility retirements against external regulatory interference.