Code information notices

The Electricity Authority can issue notices under the Electricity Industry Participation Code that require industry participants to provide specific information. These notices help us monitor the market and support a better understanding of how it is operating.

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Clause 2.16 notices

Clause 2.16 notices allow us to collect and publish data, information and tools that support effective monitoring of the electricity industry and markets. This helps the Authority, industry participants and consumers to better understand how the markets are performing and to ensure the right rules are in place for a well‑functioning electricity system.

We consult with industry participants before issuing a notice under Clause 2.16 to make sure the information requirements are workable and can be delivered at a reasonable cost.

Industry participants must comply with all clause 2.16 notices.

1. Retail market monitoring notice

This notice requires all retailers to provide monthly information on domestic and small business customers (effective 31 August 2025).

It increase transparency and accountability in the retail electricity market and helps us monitor the retail market, including plans and prices, the Consumer Care Obligations, the barriers that customers face and retail competition.

2. Investment pipeline notice

Distributors

This notice is for distributors to provide information on significant upcoming generation and load projects on their networks (effective 1 December 2026).

This helps us monitor future electricity supply and demand levels.

Transpower

This notice is for Transpower to provide information on upcoming generation and load projects, like solar farms and data centres (effective 1 February 2025).

It helps us monitor future electricity supply and demand levels.

3. Cost of investment notice

This notice is for generators to provide information about the cost of new generation projects (effective 1 February 2025).

It helps us assess whether prices are aligned with the cost of providing new generation.

4. Thermal fuel disclosure notice

This notice is for all generators with generating units that use natural gas, diesel, coal or biomass as a fuel source (effective 1 April 2025).

It helps to ensure that participants can make informed decisions about risk management as we head into this winter and beyond.

5. Over-the-counter bids and offers data

This notice requires participants to provide us with information on requests for over-the-counter hedge contracts and the responses to those requests. It applies to participants who request to buy or sell OTC contracts of 0.1MW or larger, including retailers and industrial participants buying electricity from the clearing manager and generators.

Standardised super-peak contracts available for trade on an electronic platform are excluded from the OTC bids and offers data notice. Participants in these trading sessions do not need to provide this information to the Authority.

You can watch the recording of a webinar we held to answer any questions regarding this notice.

See below for the template CSV files and data tables.

6. Standardised super-peak hedge contract trading data notice

This notice requires platform operators to supply us with a file showing all actions taken during each trading event by 9.00am the following day. This establishes a clear, legal, and consistent way to collect up-to-date information about standardised super-peak trading events.

7. Energy margin data

This notice requires large generators to provide monthly financial information to the Electricity Authority so we can calculate energy margins (effective 5 July 2026).

We will publish aggregated, averaged energy margin data on a monthly basis (from September 2026), alongside the average weekly spot price, to improve transparency, strengthen our monitoring of market outcomes, and support confidence in the wholesale electricity market.

Guidance on clause 2.16 notice data types

This guidance details the different data types that may be used in clause 2.16 notices published from September 2025 onwards. Previous and future notices may include other data types.

Clause 6B.10(3) notices

Clause 6B.10(3) notices are formal requests from the Electricity Authority for lines companies to provide a connection charge reconciliation and any related information. These notices require lines companies to supply the information in the form and timeframe specified by the Authority.

Lines companies must comply with all clause 6B.10(3) notices:

Please note:

  • you may use either version of the above versions of the notice for the first two reporting periods (1 April – 30 June and 1 July – 30 September 2026). Thereafter, data must be reported using only version 2.1 of the notice
  • both versions were updated on 15 July 2026 to change the data format for the QuoteID from Integer to String. Version 1 was updated on 24 June 2026 to correct a small error in the original version
  • only use version 1.1 or 2.1 of the notice.

Part 13 information forms

Gentailers and retailers are required to provide information to the Electricity Authority to support the monitoring of non-discrimination obligations under Part 13 of the Electricity Industry Participation Code.

1. Retail gross margin and gentailer cost

Retailers with at least 1% of installation control points (ICPs) over the 12 months preceding the end of their financial year are required to provide retail gross margin information to the Authority relating to the sale of electricity to mass-market customers.

Gentailers must provide cost information relating to the sale of electricity to mass-market customers over their most recently completed financial year.

2. Retail price consistency assessment

This form applies to gentailers and specifies how information must be provided to meet retail price consistency assessment requirements.