Expansion of Production Facilities. All public utilities must obtain prior approval of the Commission for the significant purchase of capital for the production or transmission of electricity, water, or treatment of wastewater. (a) Approval of purchase is subject to preliminary approval of proposed rate structure following divestiture. (b) A significant purchase of capital for the production of electricity, water, or treatment of wastewater is that purchase which may cause a modification or change in the rate structure being charged to the customer. Source: PL 12-39, § 1(b) (8326), modified; repealed and reenacted by PL 15-35, § 2 (8440), modified.