We publish current investigations for industry participants. Information on current and completed investigations is available below. 2014 investigations on Vinalco Energy2017 investigation on Synergy Main navigation Access Electricity Access Guidelines Access Arrangement Information Guidelines Regulatory test guideline Multi-function asset guideline Demand management innovation allowance mechanism guideline New facility investment test and net benefit guideline Western Power network Network access Access arrangements Access arrangement 2022 to 2027 Framework and approach 2022 to 2027 Access arrangement 2017 to 2022 Annual price lists Demand management innovation allowance Model alternative options contract New facility investment tests Non-capital cost determinations Eastern Goldfields network control service costs Regulatory tests 2020 Western Power Picton South Staged 132kV Conversion – Regulatory Test proposal by Western Power Service standards Technical Rules Exemptions approved by the ERA Bounty Substation and Kondinin-Bounty Sub-Network Exemptions approved by Western Power Proposed amendments to the Technical Rules Metering Metrology procedure Model Service Level Agreement Consumer Price Index Adjustments Horizon Power Rottnest Island Authority Peel Renewable Energy Pilbara Networks Ringfencing Rate of return Arbitration and disputes Gas Access Guidelines Gas access arrangement guideline Gas rate of return instrument 2022 gas rate of return instrument 2022 gas rate of return instrument review Amendments to 2022 gas rate of return instrument Consumer Reference Group - Gas rate of return instrument Independent Panel - Gas rate of return instrument Light regulation financial reporting guideline Dampier to Bunbury Natural Gas Pipeline Access arrangements Access arrangement 2026 to 2030 Access arrangement 2021 to 2025 Tariff variations Goldfields Gas Pipeline Access arrangements Access arrangement 2025 to 2029 Access arrangement 2020 to 2024 Tariff variations Mid-West and South-West Gas Distribution Systems Access arrangements Access arrangement 2025 to 2029 Access arrangement 2020 to 2024 Tariff variations Regulatory information notices Kalgoorlie to Kambalda Pipeline Non-scheme pipelines Information disclosure Arbitration Applications for exemption Public register List of expired Non-scheme Gas Pipeline exemptions Compliance Rail Access Information for access seekers Railways Access Code Rail rate of return 2023 rail rate of return review Access Code reviews Arbitration Regulated rail networks Public Transport Authority Costing principles Initial regulatory asset base Overpayment rules Segregation arrangements Standard access provisions Total and incremental costs Train management guidelines Train path policy Arc Infrastructure Access proposals 2002 Access Proposal by Portman Iron Ore Ltd 2013 Access Proposal by Co-operative Bulk Handling Ltd Costing principles Depreciation schedule Initial regulatory asset base Overpayment rules Segregation arrangements Standard access provisions Total and incremental costs Train management guidelines Train path policy The Pilbara Infrastructure Pty Ltd Access proposals 2013 Access Proposal by Brockman Iron Pty Ltd Costing principles Overpayment rules Segregation arrangements Total and incremental costs Train management guidelines Train path policy Roy Hill Infrastructure Costing Principles Overpayment Rules Segregation Arrangements Train Management Guidelines Train Path Policy Alternative Electricity Services Customer Protection Energy performance data Water performance data Family and domestic violence information Customer protection codes Code of Conduct for the Supply of Electricity to Small Use Customers 2024 Electricity Code review 2022 Electricity Code review Electricity Code Consultative Committee Compendium of Gas Licence Obligations 2023 Gas Compendium review 2019 Gas Compendium review Gas Marketing Code of Conduct 2025 Gas Code review 2022 Gas Code review Gas Marketing Code Consultative Committee Water Services Code of Conduct (Customer Service Standards) 2023 Water Code review 2018 Water Code review Water Code Consultative Committee Switched On: Energy consumers' guide Can I choose my retailer? 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Financial Hardship Policies Standard Form Contracts Regulatory Guidelines 2024/25 review of Audit and Review Guidelines Licensees Licence reviews 2020 gas licence review Markets Wholesale Electricity Market Compliance Compliance framework and strategy Consultation on compliance for the new market Compliance reports AEMO's compliance The ERA's compliance Western Power's compliance Market participant compliance Exempt generators Investigations 2014 investigations on Vinalco Energy 2017 investigation on Synergy Market surveillance Pilbara Networks Arbitration and disputes Public register of breaches and investigations Report a breach Market effectiveness Limit Advice and Constraint Equations Review 2025 Review Synergy's Regulatory Scheme Review of Synergy's Regulatory Scheme 2021-2023 Portfolio Assessment Price Setting AEMO's revenue and capital expenditure Allowable revenue period from 1 July 2022 to 30 June 2025 Benchmark Reserve Capacity Prices Benchmark Reserve Capacity Prices for 2027/28 Benchmark Reserve Capacity Prices for 2026/27 Benchmark Reserve Capacity Prices for 2025/26 Market Price Limits Energy Offer Price Ceiling 2024 Review Energy Offer Price Floor 2025 Review Frequency Co-optimised Essential System Services Offer Price Ceiling 2023 Review WEM procedures Procedure changes WEM Procedure Change EEPC_2024_04: ERA triggering the SESSM WEM Procedure Change EEPC_2024_03: Portfolio determination WEM Procedure Change EEPC_2024_02: Monitoring protocol WEM Procedure Change EEPC_2024_01: Benchmark Reserve Capacity Price WEM Procedure Change EEPC_2023_03 - ERA triggering the SESSM WEM Procedure Change EEPC_2023_02 - Portfolio determination WEM Procedure Change EEPC_2023_01 - Monitoring protocol Gas Markets Gas Retail Market Scheme Retail Market Scheme Changes Compliance Compliance framework and strategy Compliance reports The ERA's compliance Market participant compliance Report a breach About Us Our Team Annual Report Corporate Documents Media Statements Consumer Consultative Committee Freedom of Information Public Interest Disclosure Contact Us Subscribe to receive updates Inquiries Completed Inquiries Related Pages WEM Rules Report a suspected breach of the WEM, GSI or Pilbara Networks Rules GSI Rules Report a suspected breach of the WEM, GSI or Pilbara Networks Rules Market Surveillance