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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

DPP4 applies to gas pipeline services from 1 October 2026 to 30 September 2031.

Wholesale Supply Inquiry

The Commerce Commission is carrying out an Inquiry into the wholesale supply of groceries to consider whether additional regulation should apply.

Targeted Amendments to Airport Cost of Capital IMs

We are considering potential amendments to aspects of the Airport Input Methodologies for cost of capital.

Interchange fee regulation

We monitor and regulate interchange fees charged on the Mastercard and Visa debit and credit networks to promote a competitive and efficient payment system.

Recommendation to designate the interbank payment network

In 2024, we made a recommendation to the Minister of Commerce and Consumer Affairs, to designate the interbank payment network under the Retail Payment System Act.

Regulation of Wellington’s water services

The Commerce Commission is proposing ongoing targeted economic regulation to improve transparency, accountability, and outcomes for Wellington consumers.

Airport information disclosure template update 2026

We are making non-material changes to the information disclosure (ID) requirements for airports as required under Part 4 of the Commerce Act.

IM Amendments – Treatment of government grants related to income

We are amending the IMs for EDBs, GPBs and Transpower for the treatment of government grants related to income.

Amendments to IMs for EDBs – to account for shifted revenue

We are currently amending the electricity distribution business (EDB) input methodology (IM) to account for shifted revenue.

2025-2030 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.

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