Creates new provisions relating to electric utilities

HB 1084 allows electric utilities in Missouri to include "construction work in progress" (CWIP) costs for new qualifying clean energy projects - specifically nuclear plants under 600 megawatts - directly in their rate base for recovery. This affects utilities building such plants and their customers, who pay for these costs through utility rates. Key provisions require utilities to file detailed cost plans before construction begins, limit included costs to actual project expenses within the estimated timeline, and allow refunds with interest if costs are deemed imprudent. The rule expires in 2035 unless extended by the utility commission after a 2035 hearing, and does not apply to plants operational before August 2025.