Section 257.11A - Supplementary weighting and school reorganization1. In determining weighted enrollment under section 257.6, if the board of directors of a school district has approved a contract for sharing pursuant to section 257.11 and the school district has approved an action to bring about a reorganization to take effect on and after July 1, 2007, and on or before July 1, 2024, the reorganized school district shall include, for a period of three years following the effective date of the reorganization, additional pupils added by the application of the supplementary weighting plan, equal to the pupils added by the application of the supplementary weighting plan in the year preceding the reorganization. For the purposes of this subsection, the weighted enrollment for the period of three years following the effective date of reorganization shall include the supplementary weighting in the base year used for determining the combined district cost for the first year of the reorganization. However, the weighting shall be reduced by the supplementary weighting added for a pupil whose residency is not within the reorganized district.2. For purposes of this section, a reorganized district is one in which the reorganization was approved in an election pursuant to sections 275.18 and 275.20 and takes effect on or after July 1, 2007, and on or before July 1, 2024. Each district which initiates, by a vote of the board of directors or jointly by the affected boards, action to bring about a reorganization or dissolution to take effect on or after July 1, 2007, and on or before July 1, 2024, shall certify the date and the nature of the action taken to the department of education by January 1 of the year in which the reorganization or dissolution takes effect.3. A school district shall be eligible for a combined maximum total of six years of supplementary weighting under the provisions of this section and section 257.11, subsection 2, paragraph "c".