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Regulatory projects

This section contains all current and closed Commission regulatory projects. This includes determinations, reports, inquiries, studies and disclosures relating to telecommunications, grocery, fuel, water, the retail payment system, electricity lines, gas pipelines, airports and dairy.

2026 Gas default price-quality path

We’re reviewing the default price-quality paths (DPP4) for gas distribution and transmission from 1 Oct 2026. The current paths (DPP3), set in 2022, expire on 30 Sep 2026. New DPPs must be set by 31 May 2026 under the Commerce Act.

2022 gas default price-quality path

We have completed our review of the default price-quality paths (DPP) that apply to gas distribution and gas transmission businesses.

Economic Regulation of Water Services – Crown Monitor

As Crown monitor, we monitor Watercare, Auckland’s water supply and wastewater service provider.

Economic Regulation of Water Services – Information Disclosure

We will use information disclosure as a tool to regulate councils and water organisations that provide water supply and/or wastewater services.

Monitoring

We have responsibilities for monitoring competition and efficiency in the retail payment system. Our focus is on improving transparency and understanding of the system, including to inform where to focus our efforts to deliver long-term benefits for consumers and merchants.

Foundational Information Disclosure for Wellington Water

On 15 May 2025 following a Government decision, Wellington Water Limited became a specified entity subject to ‘foundational information disclosure’ (foundational ID).

Review of price setting event 5 – Wellington Airport

We have now completed our review of Wellington Airport’s price setting event for the period 1 July 2024 – 31 March 2029 (PSE5). Our review included analysis of Wellington Airport’s pricing decisions and forward-looking performance over this period.

2025 reset of the electricity default price-quality path

On 20 November 2024, we published our final decisions for the default price quality path for electricity distribution businesses (DPP4), beginning 1 April 2025.

Review of Co-location on Cellular Mobile Transmission Sites

Mobile Co-location enables a Mobile Network Operator (MNO) to install mobile network transmission and reception equipment on another MNO’s tower.

Review of the Grocery Supply Code

As part of its grocery responsibilities the Commission is required to review the operation and effectiveness of the Grocery Supply Code, with the first review due by 28 September 2025.

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