Procedure for changing level of rate.

1. The utility may change the level of a rate within an established range of rates pursuant to a schedule approved by the Commission for generating, industrial or large commercial customers by filing a memorandum with the Commission stating the new level of the rate, the name of the affected customer and the effective date of the change. 2. As used in this section, “memorandum” means a written notice from a utility to the Commission of any change to rates or any changes to a schedule approved by the Commission.