On or before July 1 of the year following the approval of a regional service area's plan pursuant to section 22-5.5-105, and on or before January 1 each year thereafter, the regional service council shall submit a written report on behalf of the regional service area to the state board and the department summarizing its activities for the calendar year, especially those activities related to the measurable goals and objectives outlined in the plan, a summary of any efficiencies or improved effectiveness achieved at the district or regional level by the regional service area, and any proposed amendments to the plan originally submitted to the state board pursuant to this article.