Final decisions
The input methodologies (IMs) were first determined in December 2010 for specified airport services, electricity distribution and transmission, and gas pipelines. We are required to review the IMs every 7 years.
On this page you will find the final decisions on the 2015/16 IM review.
In December 2016 we reached decisions on all IMs within the scope of the 2015/16 IM review, except for three areas:
- we reached decisions on the Transpower Incremental Rolling Incentive Scheme (IRIS) in June 2017
- we reached decisions on the customised price-quality path (CPP) information requirements for gas in December 2017
- we reached decisions on the related party transaction provisions in December 2017.
For consultation and supporting documents, go to the process and consultation page.
The current consolidated IMs are available on the individual sectors' pages:
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Input methodologies review decisions – Consolidated reasons papers – 20 December 2016
( 12 MB, PDF )
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Input methodologies review decisions – Summary paper – 20 December 2016
( 458 KB, PDF )
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Input methodologies review decisions – Introduction and process paper – 20 December 2016
( 760 KB, PDF )
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Input methodologies review decisions – Framework for the IM review – 20 December 2016
( 688 KB, PDF )
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Input methodologies review decisions – Report on the IM review – 20 December 2016
( 1.9 MB, PDF )
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Input methodologies review decisions – Topic paper 1 – Form of control and RAB indexation for EDBs, GPBs and Transpower – 20 December 2016
( 934 KB, PDF )
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Input methodologies review decisions – Topic paper 2 – CPP requirements – 20 December 2016
( 1.6 MB, PDF )
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Input methodologies review decisions – Topic paper 3 – The future impact of emerging technologies in the energy sector – 20 December 2016
( 923 KB, PDF )
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Input methodologies review decisions – Topic paper 4 – Cost of capital issues – 20 December 2016
( 3 MB, PDF )
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Input methodologies review decisions – Topic paper 5 – Airports profitability assessment – 20 December 2016
( 1.5 MB, PDF )
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Input methodologies review decisions – Topic paper 6 – WACC percentile for airports – 20 December 2016
( 652 KB, PDF )
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Input methodologies review decisions – CPP information requirements for gas pipeline businesses – 13 December 2017
( 202 KB, PDF )
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Input methodologies review final decision – Transpower incremental rolling incentive scheme – 29 June 2017
( 707 KB, PDF )
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Related party transactions – Input Methodologies review – Final decision and determinations guidance – 21 December 2017
( 1.4 MB, PDF )
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Airport ID Determination Pricing Templates version 3.0 – 20 December 2016
( 835 KB, XLSM )
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GTB ID determination templates for schedules 1 to 10 v4.1 2017 – 21 December 2017
( 880 KB, XLSX )
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GDB ID determination templates for schedules 1 to 10 v4.1 2017 – 21 December 2017
( 877 KB, XLSX )
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EDB ID determination templates for schedules 1 to 10 v4.1 2017 – 21 December 2017
( 896 KB, XLSX )
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[2017] NZCC 35 Gas transmission information disclosure amendments determination (No.2) 2017 – 21 December 2017
( 1.8 MB, PDF )
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[2017] NZCC 33 Electricity distribution information disclosure amendments determination 2017 – 21 December 2017
( 1.8 MB, PDF )
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[2017] NZCC 32 Gas transmission services input methodologies amendments determination 2017 – 21 December 2017
( 1.7 MB, PDF )
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[2017] NZCC 31 Gas distribution services input methodologies amendments determination 2017 – 21 December 2017
( 1.7 MB, PDF )
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[2017] NZCC 30 Electricity distribution services input methodologies amendments determination 2017 – 21 December 2017
( 2.3 MB, PDF )
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[2017] NZCC 17 Transpower input methodologies amendment determination 2017
( 434 KB, PDF )
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[2016] NZCC 24 Electricity Distribution Services Input Methodology Amendments Determination 2016 – 20 December 2016
( 2.3 MB, PDF )
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[2016] NZCC 29 Airport Services Information Disclosure Amendments Determination 2016 – 20 December 2016
( 783 KB, PDF )
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[2016] NZCC 28 Airport services input methodologies amendments determination 2016 – 20 December 2016
( 862 KB, PDF )
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[2016] NZCC 27 Transpower input methodologies amendments determination 2016 – 20 December 2016
( 998 KB, PDF )
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CPP requirements for GTBs – Excel version of Schedules B and C of final IM decision – 20 December 2016
( 65 KB, XLSX )
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[2016] NZCC 26 Gas Transmission Services Input Methodologies Amendments Determination 2016 – 20 December 2016
( 2 MB, PDF )
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CPP requirements for GDBs – Excel version of Schedules B and C of final IM decision – 20 December 2016
( 57 KB, XLSX )
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[2016] NZCC 25 Gas Distribution Services Input Methodologies Amendments Determination 2016 – 20 December 2016
( 2 MB, PDF )
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CPP requirements for EDBs – Excel version of Schedule E of final IM decision – 20 December 2016
( 127 KB, XLSX )
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CPP requirements for EDBs – Excel version of Schedules B and C of final IM decision – 20 December 2016
( 68 KB, XLSX )
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Input methodologies review decisions – Analyst briefing presentation – 20 December 2016
( 1.8 MB, PDF )
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Dr Lally’s expert advice – Review of further WACC submissions – report to the Commerce Commission – 23 November 2016
( 507 KB, PDF )
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Input methodologies review decisions – WACC calculation spreadsheet – 20 December 2016
( 731 KB, XLSX )
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Letter to the ENA in response to the ENA’s letter of October 2016 regarding live line work – 20 December 2016
( 211 KB, PDF )
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Related parties requirements – Workshop slides – 21 March 2018
( 1.5 MB, PDF )
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Related parties requirements – Workshop slides – 22 March 2018
( 2.2 MB, PDF )
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Guidance on related party disclosure requirements – Flow chart – May 2018
( 380 KB, PDF )
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