Process and consultation
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. We completed our review in December 2016.
On this page you will find the process and consultation documents related to the 2015/16 IM review. For the final decisions and reasons papers, go to the final decisions page.
See documents by topic area:
The current consolidated IMs are available on the individual sectors' pages:
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NZ Airports – Submission on technical consultation update paper – [REVISED DRAFT] Commerce Act (Specified Airport Services) Information Disclosure – 3 November 2016
( 1 MB, PDF )
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Wellington Electricity – Submission on IM review technical consultation update paper – 3 November 2016
( 2.9 MB, PDF )
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Vector – Submission on IM review technical consultation update paper – 3 November 2016
( 453 KB, PDF )
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Vector – Submission on ENA letter regarding live-line work – 3 November 2016
( 245 KB, PDF )
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Transpower (Frontier Economics) – Submission on IM review technical consultation update paper – Appendix B_Frontier note on NPV – 3 November 2016
( 208 KB, PDF )
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Transpower – Submission on technical consultation update paper – Part 3 Subpart 5 alternative – 3 November 2016
( 575 KB, PDF )
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Transpower – Submission on technical consultation update paper – [REVISED DRAFT] Transpower Input Methodologies Amendments Determination 2016 – 3 November 2016
( 1.2 MB, PDF )
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Transpower – Submission on IM review technical consultation update paper – 3 November 2016
( 477 KB, PDF )
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Powerco – Submission on IM review technical consultation update paper – 3 November 2016
( 508 KB, PDF )
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Orion – Submission on IM review technical consultation update paper and on ENA letter regarding live-line work – 3 November 2016
( 433 KB, PDF )
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NZ Airports – Submission on technical consultation update paper – Pricing schedule comments in mark-up – 3 November 2016
( 204 KB, XLSX )
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BARNZ – Submission on IM review technical consultation update paper update paper – 3 November 2016
( 978 KB, PDF )
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NZ Airports – Submission on technical consultation update paper – [REVISED DRAFT] Airports (Specified Airport Services) Input Methodologies – 3 November 2016
( 296 KB, PDF )
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NZ Airports – Submission on IM review technical consultation update paper – 3 November 2016
( 186 KB, PDF )
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MEUG – Submission on ENA letter regarding live-line work – 3 November 2016
( 90 KB, PDF )
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First Gas – Submission on IM review technical consultation update paper – 3 November 2016
( 219 KB, PDF )
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ENA – Submission on technical consultation update paper – [REVISED DRAFT] Electricity Distribution Services Input Methodologies Amendments Determination 2016 – 3 November 2016
( 2.1 MB, PDF )
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ENA – Submission on IM review technical consultation update paper – 3 November 2016
( 1 MB, PDF )
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Contact Energy – Submission on IM review technical consultation update paper – NZ bond data October 2016 – 3 November 2016
( 21 KB, XLSX )
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Contact Energy – Submission on IM review technical consultation update paper – 3 November 2016
( 296 KB, PDF )
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Christchurch Airport – Submission on IM review technical consultation update paper – 3 November 2016
( 447 KB, PDF )
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Aurora – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 787 KB, PDF )
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Contact Energy – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 245 KB, PDF )
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ENA – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 885 KB, PDF )
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ERANZ – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 460 KB, PDF )
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ETNZ – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 451 KB, PDF )
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Genesis Energy – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 55 KB, PDF )
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Vector – Cross-submission on further consultation paper on cost allocation for electricity and gas businesses – 25 October 2016
( 244 KB, PDF )
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Letter from ENA – Impact of a reduction of live line work on Non-exempt EDBs under the Default and Customised Price Quality Path – October 2016
( 417 KB, PDF )
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Aurora – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 720 KB, PDF )
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Chorus – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 221 KB, PDF )
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Contact Energy – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 344 KB, PDF )
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ENA – Submission on further consultation paper on cost allocation for electricity and gas businesses – 14 October 2016
( 969 KB, PDF )
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ERANZ – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 1 MB, PDF )
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Genesis Energy – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 55 KB, PDF )
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MEUG – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 81 KB, PDF )
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Pioneer Energy – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 180 KB, PDF )
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Powerco – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 365 KB, PDF )
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PwC – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 202 KB, PDF )
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Unison – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 159 KB, PDF )
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Vector – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 285 KB, PDF )
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Wellington Electricity – Submission on further consultation paper on cost allocation for electricity and gas businesses – 13 October 2016
( 1.8 MB, PDF )
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Input methodologies review – Technical consultation update paper – 13 October 2016
( 924 KB, PDF )
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[REVISED DRAFT] Electricity Distribution Services Input Methodology Amendments Determination 2016 – 13 October 2016
( 2.4 MB, PDF )
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[REVISED DRAFT] Electricity Distribution Services Input Methodology Amendments Determination 2016 – 13 October 2016 - 01
( 1.1 MB, DOCX )
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[REVISED DRAFT] Gas Transmission Services Input Methodologies Amendments Determination 2016 – 13 October 2016
( 2.1 MB, PDF )
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[REVISED DRAFT] Gas Transmission Services Input Methodologies Amendments Determination 2016 – 13 October 2016 - 01
( 1 MB, DOCX )
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[REVISED DRAFT] Gas Distribution Services Input Methodologies Amendments Determination 2016 – 13 October 2016
( 2 MB, PDF )
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[REVISED DRAFT] Gas Distribution Services Input Methodologies Amendments Determination 2016 – 13 October 2016 - 01
( 963 KB, DOCX )
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[REVISED DRAFT] Transpower Input Methodologies Amendments Determination 2016 – 13 October 2016
( 900 KB, PDF )
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[REVISED DRAFT] Transpower Input Methodologies Amendments Determination 2016 – 13 October 2016 - 01
( 289 KB, DOCX )
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[REVISED DRAFT] Airports (Specified Airport Services) Input Methodologies Amendments Determination 2016 – 13 October 2016
( 791 KB, PDF )
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[REVISED DRAFT] Airports (Specified Airport Services) Input Methodologies Amendments Determination 2016 – 13 October 2016 - 01
( 208 KB, DOCX )
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[REVISED DRAFT] Amendments to the Commerce Act (Specified Airport Services Information Disclosure) Determination 2010 – 13 October 2016
( 1.7 MB, PDF )
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[REVISED DRAFT] Amendments to the Commerce Act (Specified Airport Services Information Disclosure) Determination 2010 – 13 October 2016 - 01
( 854 KB, DOCX )
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[REVISED DRAFT] Airport ID Determination Pricing templates – 13 October 2016
( 832 KB, XLSM )
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[REVISED DRAFT] Airport ID Determination Annual templates – 13 October 2016
( 986 KB, XLSX )
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IM review – Process update paper – 14 September 2016
( 390 KB, PDF )
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IM review – Amended notice of intention – 14 September 2016
( 240 KB, PDF )
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Input methodologies review: Report on the IM review – 22 June 2016
( 1.7 MB, PDF )
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Input methodologies review draft decisions: Companion log – 22 June 2016
( 38 KB, XLSX )
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[DRAFT] Transpower input methodologies determination – 22 June 2016
( 1 MB, PDF )
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[DRAFT] Transpower input methodologies determination – 22 June 2016 - 01
( 278 KB, DOCX )
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Input methodologies review draft decisions – Consolidated package of 16 June 2016 draft decisions papers – 16 June 2016
( 10 MB, PDF )
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Input methodologies review draft decisions – Summary paper – 16 June 2016
( 427 KB, PDF )
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Input methodologies review draft decisions – Introduction and process paper – 16 June 2016
( 654 KB, PDF )
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Input methodologies review draft decisions – Framework for the IM review – 16 June 2016
( 642 KB, PDF )
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Input methodologies review draft decisions – Topic paper 7 – Related party transactions – 16 June 2016
( 521 KB, PDF )
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Cover letter for the notice of intention to commence a review of input methodologies – 10 June 2015
( 415 KB, PDF )
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Notice of intention – Input methodologies review – 10 June 2015
( 347 KB, PDF )
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Proposed scope, timing and focus for the review of input methodologies – Open letter – 27 February 2015
( 344 KB, PDF )
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Input methodologies review – Process update paper – 29 February 2016
( 389 KB, PDF )
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Input methodologies review – Process update paper – 30 October 2015
( 462 KB, PDF )
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ENA – submission on process update paper – 24 March 2016
( 422 KB, PDF )
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Pioneer Generation – submission on process update paper – 24 March 2016
( 179 KB, PDF )
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Powerco – submission on process update paper – 24 March 2016
( 240 KB, PDF )
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PwC – submission on process update paper – 24 March 2016
( 197 KB, PDF )
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Amended notice of intention – Input methodologies review – 2 December 2015
( 370 KB, PDF )
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Notice of intention – Input methodologies review – 10 June 2015
( 347 KB, PDF )
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Molly Melhuish Cross submission on Problem Definition -7 September 2015
( 56 KB, PDF )
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WIAL Cross submission on Problem Definition - 4 September 2015
( 72 KB, PDF )
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Vector Cross submission on Problem Definition -4 September 2015
( 76 KB, PDF )
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Transpower Cross submission on Problem Definition - 4 September 2015
( 664 KB, PDF )
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SEANZ Cross submission on Problem Definition - 8 September 2015
( 205 KB, PDF )
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HoustonKemp on behalf of Powerco Cross submission on Problem Definition - 3 September 2015
( 676 KB, PDF )
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Powerco Cross submission on Problem Definition - 4 September 2015
( 95 KB, PDF )
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Orion Cross submission Problem Definition - 4 September 2015
( 242 KB, PDF )
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NZ Airports Cross submission on Problem Definition - 4 September 2015
( 160 KB, PDF )
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AIAL Cross submission on Problem Definition - 4 September 2015
( 242 KB, PDF )
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Mighty River Power Cross submission on Problem Definition - 4 September 2015
( 106 KB, PDF )
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MDL Cross submission on Problem Definition - 4 September 2015
( 141 KB, PDF )
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Hale Twomey Arete Cosulting on behalf on MGUG Cross Submission/ Addendum to Submission made by MGUG on Problem Definition - 4 September 2015
( 256 KB, PDF )
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ENA Cross submission on Problem Definition - 4 September 2015
( 315 KB, PDF )
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Contact Energy Cross submission on Problem Definition - 4 September 2015
( 253 KB, PDF )
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CIAL Cross submission on Problem Definition - 4 September 2015
( 410 KB, PDF )
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BARNZ Cross submission on Problem Definition - 4 September 2015
( 574 KB, PDF )
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Air New Zealand Cross submission on Problem Definition - 4 September 2015
( 124 KB, PDF )
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Smart Grid Forum – Submission on problem definition – 18 July 2015
( 925 KB, PDF )
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Russell McVeagh on behalf of NZ Airports – Opinion on decision making framework – 21 August 2015
( 116 KB, PDF )
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Orion – Submission on problem definition – 21 August 2015
( 606 KB, PDF )
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Powerco – Submission on problem definition – 21 August 2015
( 189 KB, PDF )
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Houston Kemp on behalf of Powerco – Comment on the Commerce Commission's IM review – 20 August 2015
( 617 KB, PDF )
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PwC – Submission on problem definition – 21 August 2015
( 290 KB, PDF )
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SEANZ – Submission on problem definition – 21 August 2015
( 659 KB, PDF )
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SEANZ – Attachment – Rooftop solar PV and network tariffs – June 2015
( 1.4 MB, PDF )
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SEANZ – Attachment – Stranded assets of electricity networks in the National Electricity Market – April 2015
( 1.2 MB, PDF )
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Dr Harry Bush and John Earwaker on behalf of NZ Airports – Evidence relating to the assessment of the WACC percentile for airports – August 2015
( 404 KB, PDF )
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Solarcity – Submission on problem definition – August 2015
( 555 KB, PDF )
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Transpower – Submission on problem definition – August 2015
( 931 KB, PDF )
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Frontier Economics on behalf of Transpower – Recommendations on priorities for review of cost of capital IM – August 2015
( 988 KB, PDF )
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Transpower – Submission on problem definition paper regarding the threshold for changing IMs and the creation of new IMs – 25 June 2015
( 474 KB, PDF )
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Unison – Submission on problem definition – 24 August 2015
( 770 KB, PDF )
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Vector – Submission on problem definition – 21 August 2015
( 482 KB, PDF )
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WIAL – Submission on problem definition – 21 August 2015
( 144 KB, PDF )
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Wellington Electricity – Submission on problem definition – 21 August 2015
( 2.1 MB, PDF )
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ETNZ – Submission on the decision making framework – 21 August 2015
( 176 KB, PDF )
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Air New Zealand – Submission on problem definition – 21 August 2015
( 85 KB, PDF )
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Alpine Energy Ltd – Submission on problem definition – 21 August 2015
( 593 KB, PDF )
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BARNZ – Submission on problem definition – 21 August 2015
( 698 KB, PDF )
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Input methodologies review - Letter from BARNZ re withdrawal of sub on asset allocation - 14 June 2016
( 137 KB, PDF )
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Bryan Leyland (Consulting Engineer) – Submission on problem definition, topic 4 – 24 August 2015
( 235 KB, PDF )
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CIAL – Submission on problem definition – 21 August 2015
( 1.2 MB, PDF )
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ENA – Submission on problem definition – 21 August 2015
( 457 KB, PDF )
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Russell McVeagh on behalf of ENA – Advice on legal questions and decision making framework – 21 August
( 118 KB, PDF )
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AIAL – Submission on problem definition – 21 August 2015
( 410 KB, PDF )
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John Irving – Submission on problem definition paper – 13 July 2015
( 91 KB, PDF )
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Maui Pipeline – Submission on problem definition – 21 August 2015
( 607 KB, PDF )
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MEUG – Submission on problem definition – 19 August 2015
( 169 KB, PDF )
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IWA on behalf of MEUG – Black's Simple Discount Rule a cross check on the IM cost of capital – 19 August 2015
( 97 KB, PDF )
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NZIER on behalf of MEUG – Submission on problem definition – 21 August 2015
( 1.2 MB, PDF )
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MGUG – Submission on problem definition – 21 August 2015
( 423 KB, PDF )
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Molly Melhuish – Submission on problem definition – August 2015
( 391 KB, PDF )
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NZ Airports – Submission on problem definition – 21 August 2015
( 936 KB, PDF )
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Input methodologies review forum 29-30 July 2015 – programme
( 191 KB, PDF )
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Input methodologies review forum 29-30 July 2015 – Transcript
( 632 KB, PDF )
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Decision-making framework – Commerce Commission, Susannah Sharpe, Scott Pearse-Smith – 29 July 2015
( 2.1 MB, PDF )
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Price-quality regulation – Commerce Commssion, James Marshall – 29 July 2015
( 1.5 MB, PDF )
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Price-quality regulation – Wellington Electricity, Megan Willcox – 29 July 2015
( 474 KB, PDF )
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Price-quality regulation – UNL, Nathan Strong – 29 July 2015
( 945 KB, PDF )
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Price-quality regulation – ENA, Greg Houston – 29 July 2015
( 397 KB, PDF )
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Price-quality regulation – MEUG & MGUG, Ralph Matthes & Richard Hale – 29 July 2015
( 95 KB, PDF )
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Emerging technology – Commerce Commission, Diego Villalobos – 29 July 2015
( 1.6 MB, PDF )
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Emerging technology – SGF – Paul Atkins, John Hancock, Ryno Verster – 29 July 2015
( 1.1 MB, PDF )
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Emerging technology – Orion, Glen Coates – 29 July 2015
( 943 KB, PDF )
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Emerging technology – Vector, Andre Botha – 29 July 2015
( 2.6 MB, PDF )
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Emerging technology – NZIER, David de Boer – 29 July 2015
( 105 KB, PDF )
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Emerging technology – ENA, Greg Houston – 29 July 2015
( 1.7 MB, PDF )
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Emerging technology – Transpower, Ross Parry – 29 July 2015
( 1.1 MB, PDF )
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Emerging technology – Part 2 – Q&A slide, John Groot – 29 July 2015
( 73 KB, PDF )
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Complexity and compliance costs – Commerce Commission, Grant Weston – 30 July 2015
( 1.4 MB, PDF )
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Complexity and compliance costs – PwC, Lynne Taylor – 30 July 2015
( 72 KB, PDF )
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Complexity and compliance costs – Transpower, Jeremy Cain – 30 July 2015
( 1.1 MB, PDF )
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Complexity and compliance costs – Commerce Commission, Grant Weston, questions – 30 July 2015
( 1.4 MB, PDF )
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DPP-CPP – Commerce Commission, John Groot – 30 July 2015
( 812 KB, PDF )
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DPP-CPP – Powerco, Richard Fletcher – 30 July 2015
( 502 KB, PDF )
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DPP-CPP – Wellington Electricity, Greg Skelton – 30 July 2015
( 85 KB, PDF )
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CPP requirements – Main slides – Commerce Commission, Simon Copland – 30 July 2015
( 1.8 MB, PDF )
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CPP requirements – Orion, Dennis Jones – 30 July 2015
( 203 KB, PDF )
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CPP requirements – Geoff Brown – 30 July 2015
( 93 KB, PDF )
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CPP requirements – Strata, Bill Heaps – 30 July 2015
( 101 KB, PDF )
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CPP requirements – Orion feedback – Commerce Commission, Simon Copland – 30 July 2015
( 1.5 MB, PDF )
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CPP Requirements – Powerco, Oliver Vincent – 30 July 2015
( 798 KB, PDF )
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CPP requirements – PwC, Lynne Taylor – 30 July 2015
( 70 KB, PDF )
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Airports – Commerce Commission, John McLaren and Hamish Groves – 30 July 2015
( 4.8 MB, PDF )
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Airports – CIAL, Tim May – 30 July 2015
( 1.6 MB, PDF )
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Airports – AIAL, Adrienne Darling – 30 July 2015
( 777 KB, PDF )
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Airports – BARNZ, Kristina Cooper and Aaron Schiff – 30 July 2015
( 206 KB, PDF )
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Airports – AIAL, Simon Robertson – 30 July 2015
( 2.9 MB, PDF )
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Airports – WIAL, Martin Harrington – 30 July 2015
( 1.3 MB, PDF )
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John Irving – Submission on problem definition paper – 13 July 2015
( 91 KB, PDF )
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Smart Grid Forum – Submission on problem definition – 18 July 2015
( 925 KB, PDF )
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Developing decision-making frameworks for the current IM review and for considering changes to the IMs more generally – Discussion draft – 22 July 2015
( 216 KB, PDF )
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Commerce Commission response to Powerco and ENA comment on input methodologies review – 23 July 2015
( 318 KB, PDF )
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ENA – Letter on the input methodologies review timetable – 10 July 2015
( 100 KB, PDF )
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Developing decision-making frameworks for the current IM review and for considering changes to the IMs more generally – Discussion draft – 22 July 2015
( 216 KB, PDF )
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Transpower – Submission on problem definition paper regarding the threshold for changing IMs and the creation of new IMs – 25 June 2015
( 474 KB, PDF )
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Input methodologies review – process paper update on fast track amendments – 3 July 2015
( 371 KB, PDF )
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Amended notice of intention – Input methodologies review – 3 July 2015
( 361 KB, PDF )
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BARNZ – Submission on airport fast track for the IM review – 23 June 2015
( 711 KB, PDF )
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NZ Airports – Submission on airport fast track for the IM review – 23 June 2015
( 223 KB, PDF )
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Input Methodologies Review invitation to contribute to problem definition – 16 June 2015
( 716 KB, PDF )
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NZIER (on behalf of MEUG) – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 761 KB, PDF )
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WELL – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 1008 KB, PDF )
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Vector – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 105 KB, PDF )
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Unison – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 206 KB, PDF )
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Transpower – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 418 KB, PDF )
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PwC – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 329 KB, PDF )
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Powerco – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 175 KB, PDF )
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NZ Airports – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 436 KB, PDF )
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Mighty River Power – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 111 KB, PDF )
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AECT – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 87 KB, PDF )
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MEUG – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 193 KB, PDF )
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ETNZ – Submission on proposed scope timing and focus for the IM review – 28 April 2015
( 124 KB, PDF )
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ENA – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 270 KB, PDF )
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CIAL – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 586 KB, PDF )
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BARNZ – Submission on proposed scope timing and focus for IMs review – 23 March 2015
( 808 KB, PDF )
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Aurora – Submission on proposed scope timing and focus for IMs review – 31 March 2015
( 774 KB, PDF )
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Air NZ – Submission on proposed scope timing and focus for IMs review – 20 March 2015
( 40 KB, PDF )
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Proposed scope, timing and focus for the review of input methodologies – Open letter – 27 February 2015
( 344 KB, PDF )
This page was published 1 week ago