- Section 20 CSR 4240-10.010 - Books and Records
- Section 20 CSR 4240-10.020 - Income on Depreciation Fund Investments
- Section 20 CSR 4240-10.030 - [Effective until 12/31/2024] Standards of Quality
- Section 20 CSR 4240-10.030 - [Effective 12/31/2024] Standards of Quality
- Section 20 CSR 4240-10.040 - Service and Billing Practices for Commercial and Industrial Customers of Electric, Gas, Water, and Steam Heat Utilities
- Section 20 CSR 4240-10.060 - Gross Receipts Tax
- Section 20 CSR 4240-10.075 - Staff Assisted Rate Case Procedure
- Section 20 CSR 4240-10.085 - Incentives for Acquisition of Nonviable Utilities
- Section 20 CSR 4240-10.095 - Environmental Improvement Contingency Fund
- Section 20 CSR 4240-10.105 - Filing Requirements for Electric, Gas, Water, Sewer, and Steam Heating Utility Applications for Authority to Sell, Assign, Lease, or Transfer Assets
- Section 20 CSR 4240-10.115 - Filing Requirements for Electric, Gas, Water, Sewer, and Steam Heating Utility Applications for Authority to Merge or Consolidate
- Section 20 CSR 4240-10.125 - Filing Requirements for Electric, Gas, Water, Sewer, and Steam Heating Utility Applications for Authority to Issue Stock, Bonds, Notes, and Other Evidences of Indebtedness
- Section 20 CSR 4240-10.135 - Filing Requirements for Electric, Gas, Water, Sewer, and Steam Heating Utility Applications for Authority to Acquire the Stock of a Public Utility
- Section 20 CSR 4240-10.145 - Annual Report Submission Requirements for Electric, Gas, Water, Sewer, and Steam Heating Utilities