Section 393.1506 - Establishment of or change to WSIRA for recovery of appropriate pretax revenues, when, procedure1. Notwithstanding any provisions of chapter 386 and this chapter to the contrary, a water or sewer corporation that provides water or sewer service to more than eight thousand customer connections may file a petition and proposed rate schedules with the commission to establish or change a WSIRA that will provide for the recovery of the appropriate pretax revenues associated with the eligible infrastructure system projects, less the appropriate pretax revenues associated with any retired utility plant that is being replaced by the eligible infrastructure system projects. The WSIRA shall not produce revenues in excess of fifteen percent of the water or sewer corporation's base revenue requirement approved by the commission in the water or sewer corporation's most recent general rate proceeding; provided, however, that neither WSIRA revenues attributable to replacement of customer-owned lead service lines, nor any reconciliation amounts described in subdivision (2) of subsection 5 of section 393.1509, shall count toward the program cap. The WSIRA and any future changes thereto shall be calculated and implemented in accordance with the provisions of sections 393.1503 to 393.1509. WSIRA revenues shall be subject to refund based upon a finding and order of the commission, to the extent provided in subsections 5 and 8 of section 393.1509.2. The commission shall not approve a WSIRA for a water or sewer corporation that has not had a general rate proceeding decided or dismissed by issuance of a commission order within the past three years of the filing of a petition pursuant to this section unless the water or sewer corporation has filed for or is the subject of a new general rate proceeding.3. In no event shall a water or sewer corporation collect a WSIRA for a period exceeding three years unless the water or sewer corporation has filed for or is the subject of a pending general rate proceeding; provided that the WSIRA may be collected until the effective date of new rate schedules established as a result of the new general rate proceeding or until the subject general rate proceeding is otherwise decided or dismissed by issuance of a commission order without new rates being established.4. Except as provided in this subsection, in no event shall a water or sewer corporation collect a WSIRA if also collecting revenues from a commission approved infrastructure system replacement surcharge as provided in sections 393.1000 to 393.1006. In no event shall a customer be charged both an infrastructure system replacement surcharge as provided in sections 393.1000 to 393.1006 and a WSIRA. In the event a water or sewer corporation is collecting infrastructure system replacement surcharge revenues under sections 393.1000 to 393.1006, that was approved prior to August 28, 2021, when the initial WSIRA is filed, the approved infrastructure system replacement surcharge revenues shall be included in the new WSIRA filing.Added by 2021 Mo. Laws, SB 44,s A, eff. 8/28/2021.