Gas pipelines input methodologies
Input methodologies are the rules, requirements and processes that underpin regulation under Part 4 of the Commerce Act.
Amendments to the Gas IMs – WACC Percentile Adjustment
Following a High Court decision on the WACC percentile adjustment, the Commerce Commission has published documents relating to amendments to the gas input methodologies.
For more information, see Amendments to the Gas Input Methodologies (IMs) – WACC Percentile Adjustment.
Current input methodologies for gas pipeline business
The consolidated determinations below include the input methodologies that apply for information disclosure regulation:
- Gas Distribution Services Default Price-Quality Path Determination 2022 [2022] NZCC 19
- Gas Transmission Services Default Price-Quality Path Determination 2022 [2022] NZCC 20
Note: The consolidated determinations do not incorporate the amendments to the input methodologies in:
- Gas Distribution Services Input Methodologies (IM Review 2023) Amendment Determination 2023 [2023] NZCC 37 (GDB Amendment Determination 2023)
- Gas Transmission Services Input Methodologies (IM Review 2023) Amendment Determination 2023 [2023] NZCC 36 (GTB Amendment Determination 2023)
When to use the GDB Amendment Determination 2023 and GTB Amendment Determination 2023
Please refer to these 2023 amendment determinations for:
- information disclosure regulation from the commencement of disclosure year 2026
- default price-quality paths commencing on or after 1 October 2026
- customised price-quality path applications made on or after 14 December 2023, and any customised price-quality paths resulting from those applications