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NATIONAL ELECTRICITY (NORTHERN TERRITORY) (NATIONAL UNIFORM LEGISLATION) (MODIFICATION) REGULATIONS 2016

Sch 7A1 within 10 business days of receiving the NMI under

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Schedule 7A.1 within 10 business days of receiving the NMI under paragraph (d)(2), where this is required for the purposes of clause 7A.10.1. Note (g) Where a metering installation is used for operational purposes in addition to metrological purposes, the Metering Coordinator must: (1) use reasonable endeavours to ensure that there will be no infringement of the requirements of the Rules; and (2) co-ordinate with the persons who use the metering installation for such other purposes. 7A.6.3 Emergency management Note Emergency management will be considered as part of the phased 7A.6.4 Network devices Note Network devices will be considered as part of the phased implementation of the

Regulations 2016 112 7A.6.5 Metering point (a) The Metering Coordinator at a connection point must ensure that: (1) the metering point is located as close as practicable to the connection point, but is in a position that allows safe and unimpeded access to the metering installation by the Metering Provider, Metering Data Provider and any other person required or permitted to have access to the metering installation under the Rules or any other law; and Note (2) any instrument transformers required for a check metering installation are located in a position that achieves a mathematical correlation with the metering data. Note (b) The financially responsible participant, the Local Network Service Provider and NTESMO must use their best endeavours to agree to adjust the metering data which is recorded in the metering database to allow for physical losses between the metering point and the relevant connection point where a meter is used to measure the flow of electricity in a power conductor. 7A.6.6 Metering installation types and accuracy (a) The type of metering installation and the accuracy requirements for a metering installation are to be determined in accordance with Note This Chapter 7A makes provision for type 7 metering installations and imposes requirements on type 7 metering installations, including obligations about calculating metering data. Those obligations will only apply in this jurisdiction in the event of a type 7 metering installation being available in this jurisdiction and after a 12 month transitional period allowing all participants to achieve compliance. (b) A check metering installation is not required to have the degree of accuracy required of a metering installation but the Metering Coordinator must ensure that it has mathematical correlation with the metering installation and complies with the requirements of

Regulations 2016 113 (c) The Metering Coordinator at a connection point must ensure that the accuracy of a type 6 metering installation is in accordance with regulations issued under the National Measurement Act or, in the absence of any such regulations, with schedule 7A.7. Note 7A.6.7 Functionality requirements for type 1, 2, 3 and 4 metering (a) This clause applies in respect of a type 1, 2, 3 or 4 metering (b) The Metering Coordinator at a connection point must ensure that the metering installation complies with the functionality requirements specified in schedule 7A.5. 7A.6.8 Meter churn (a) A Metering Coordinator may arrange to alter a type 5 or 6 metering installation to make it capable of remote acquisition if: (1) the alteration is reasonably required to address operational difficulties; or (2) the Metering Coordinator is the Local Network Service Provider and the alteration is reasonably required to enable the Local Network Service Provider to meet its obligations to provide a safe, reliable and secure network. (b) An alteration of a metering installation by a Metering Coordinator in accordance with paragraph (a) does not alter the classification of that installation to a type 4 or 4A metering installation. (c) For paragraph (a)(1), operational difficulties arise if the metering installation is difficult or unsafe to access because: (1) it is on a remote property; (2) it is within a secure facility; (3) it is in close proximity to hazardous materials; or (4) accessing or arranging access to it otherwise poses a risk to the safety and security of persons or property.

Schedule Sch 7A - NATIONAL ELECTRICITY (NORTHERN TERRITORY) (NATIONAL UNIFORM LEGISLATION) (MODIFICATION) REGULATIONS 2016 - 1 within 10 business days of receiving the NMI under | Zoe

Regulations 2016 133 (d) A Metering Data Provider responsible for a type 7 metering installation must ensure that the metering data for that installation: (1) is calculated in accordance with the Network Service Provider's applicable procedure, which must be based on a methodology in, or otherwise be consistent with, (2) is validated in accordance with schedule 7A.7. (e) If validation under paragraph (d)(2) demonstrates that there has been a failure of the metering installation or that a measurement error exists, the Metering Data Provider must ensure the metering data is substituted in accordance with schedule 7A.7. 7A.8.8 Time settings (a) The Metering Provider must set the times of clocks of all metering installations with reference to Australian Central Standard Time to a standard of accuracy in accordance with schedule 7A.4 relevant to the load through the connection point when installing, testing and maintaining metering installations. (b) NTESMO must ensure that the metering database clock is maintained within ±1 second of Australian Central Standard Time. (c) The Metering Data Provider must ensure that the metering data services database clock is maintained within ±1 second of Australian Central Standard Time. (d) The Metering Data Provider must: (1) check the accuracy of the clock of the metering installation with reference to Australian Central Standard Time to a standard of accuracy in accordance with schedule 7A.4 relevant to the load through the connection point on each occasion that the metering installation is accessed; (2) reset the clock of the metering installation so that it is maintained to the required standard of accuracy in accordance with schedule 7A.4 relevant to the load through the connection point if the clock error of a metering installation does not conform to the required standard of accuracy on any occasion that the metering installation is accessed; and (3) notify the Metering Provider if the Metering Data Provider is unable to reset the clock of the metering installation in accordance with subparagraph (2).

Regulations 2016 136 (2) except as specified in subparagraph (1), must ensure that no other person has access to the metering database. (d) For all types of metering installations, the metering database must contain metering data that is: (1) retained in an electronic format for at least 13 months; and (2) following the retention under subparagraph (1), archived in an accessible format for an overall period of not less than 7 years. (e) The settlements ready data held in the metering data base must be used by NTESMO for settlement purposes. (f) The settlements ready data held in the metering database may be used by Distribution Network Service Providers for the purpose of determining distribution service charges in accordance with clause 6.20.1. (g) NTESMO must retain settlements ready data for all metering installations for at least 7 years. (h) Despite anything to the contrary in this Rule, NTESMO may provide the energy ombudsman with metering data relating to a Registered Participant from a metering installation, the metering database, or the metering register, if the energy ombudsman has received a complaint to which the data is relevant from a retail customer of the Registered Participant. (i) NTESMO must notify the relevant Registered Participant of any information requested by the energy ombudsman under paragraph (h) and, if it is requested by that Registered Participant, supply the Registered Participant with a copy of any information provided to the energy ombudsman. 7A.9.2 Data validation, substitution and estimation (a) If NTESMO in the preparation of settlements ready data detects metering data that fails validation NTESMO must notify the Metering Data Provider within 1 business day of detection. (b) Where a Metering Data Provider receives notification under paragraph (a), the Metering Data Provider must use its best endeavours to provide corrected metering data to NTESMO within 1 business day or advise NTESMO that this time limit cannot be achieved, and the reason for delay, in which case the parties must agree on a revised time limit by which the corrected metering data will be provided.

Regulations 2016 139 (2) for the purposes of this Chapter the energy data for the metering point in the metering installation is to be taken to be correct, unless it is proven to be incorrect. (d) If there is a discrepancy between information held in a metering register and the same category of information in any other database, then for the purposes of this Chapter the information recorded in the metering register is to be taken to be correct, unless it is proven to be incorrect. Metering Coordinators must keep the registry accurate (e) If a Metering Coordinator becomes aware of a change to, or an inaccuracy in, information in the metering register, then it must as soon as practicable and no later than 2 business days after the day it becomes aware of the change or inaccuracy notify NTESMO and provide details of the change to, or inaccuracy in, the information. NTESMO may amend metering register (f) If NTESMO is notified of an inaccuracy in information by a Metering Coordinator or other Registered Participant in relation to the connection point it is financially responsible for, NTESMO must undertake investigations to the standard of good industry practice to determine whether the metering register should be updated. (g) If NTESMO determines that the metering register should be updated as a result of an investigation conducted in accordance with paragraph (a), NTESMO must update the registry to reflect the change to, or correct the inaccuracy in, the information. (h) If information for a connection point is updated in the metering register, NTESMO must, within 2 business days after the update, notify the update to: (1) the financially responsible participant; and (2) if the financially responsible participant is a retailer and there was a change in retailer, the previous retailer where that updated information relates to a period or periods when the previous retailer was the retailer for that connection point. Note In paragraph (h)(2), references to "previous retailer" means a retailer who was previously recorded in the metering register as the financially responsible participant for the connection point referred to in paragraph (h).

Regulations 2016 170 S7A.7.3 Metering provision S7A.7.3.1 Responsibility for metering provision (a) Metering Coordinators must use Metering Providers to provide, install, test and maintain the relevant components, characteristics and service requirements of the metering installation as specified in (b) Metering Coordinators are responsible for the design of a metering installation and warrant that the design complies with the components, characteristics and service requirements specified in (c) Metering Coordinators must ensure the components have been selected, installed, tested and commissioned by the Metering Providers so that the metering installation satisfies the relevant accuracy and performance requirements in the Rules. S7A.7.3.2 Metering installation components (a) Meters used in type 1, 2, 3, 4, 4A, 5 and 6 metering installations (including transitional arrangements) specified by the National Measurement Institute, under the National Measurement Act, and must also meet the relevant requirements of Australian Standards and International Standards: (1) for type 1, 2, 3, 4, 4A, and 5 (including type 3 and 4 whole current) metering installation measurement elements: AS 62052.11, AS 62053.21 and AS 62053.22; and (2) for type 6 metering installation measurement elements: AS 1284.1, AS 62053.21 and AS 62052.11. (b) Current transformers for type 1, 2, 3, 4, 4A, 5 and 6 metering installations must meet the relevant requirements of AS 60044.1 and must also comply with any applicable specifications or guidelines (including transitional arrangements) specified by the National Measurement Institute under the National Measurement Act. (c) Voltage transformers for type 1, 2, 3, 4, 4A, 5 and 6 metering installations must meet the relevant requirements of AS 60044.2, AS 60044.3, AS 60044.5 and AS 1243 and must also comply with any applicable specifications or guidelines (including transitional arrangements) specified by the National Measurement Institute under the National Measurement Act.

Regulations 2016 171 (d) New current transformers and voltage transformers must comply with current Australian Standards. (e) In-service current transformers and voltage transformers must comply with the Australian Standard that applied at the time of (f) Unless otherwise permitted by the Rules, the Metering Coordinator must ensure that new meters and related equipment used at a connection point have a valid pattern approval issued under the authority of the National Measurement Institute or, until relevant pattern approvals exist, a valid type test certificate issued by a NATA accredited laboratory or a body recognised by NATA under the ILAC mutual recognition scheme. Relevant approval certificates must be provided to the Utilities Commission on request. (g) A visible display must be provided to display, at a minimum, the cumulative total energy for each register measured by that metering (h) Any programmable settings available within the metering installation, or any peripheral device, which may affect the resolution of displayed or stored data, must meet the relevant requirements of AS 62052.11, AS 62053.21 and AS 62053.22 and (including transitional arrangements) specified by the National Measurement Institute under the National Measurement Act. S7A.7.3.3 Use of optical ports and pulse outputs (a) Where requested by a financially responsible participant, the Metering Coordinator must provide pulse output facilities representing the quantity of electricity measured in accordance with the relevant Australian Standard for that meter within a reasonable time of receiving the request. (b) For type 1, 2, 3, 4, 4A and 5 metering installations with a pulse output, the measurement element pulse output must provide a number of energy pulses in each integrating period commensurate with the accuracy class of the metering installation when operating at the top of the range of measurement of the metering installation but may be set at a lower rate where the anticipated operating range is significantly lower than the top of the range of measurement of the metering installation.

Regulations 2016 175 a = error of VT and wiring b = error of CT and wiring c = error of meter. (d) Where the Metering Coordinator is not testing and inspecting metering installations in accordance with rule 7A.7 and schedule 7A.6 (that is, not time-based), the Metering Coordinator must include in its Asset Management Strategy an alternative inspection practice that meets the requirements of schedule 7A.6. (e) The Metering Coordinator must provide a copy of the Asset Management Strategy to each relevant Metering Provider. (f) For those meters for which new or amended pattern approval has been received from the National Measurement Institute or, in the absence of pattern approval, new or amended type testing has been undertaken by a NATA accredited laboratory or a body recognised by NATA under the ILAC mutual recognition scheme, the Metering Coordinator must ensure that the Sample Test Plan stipulates that this population of meter is tested at least once in the first three years of being placed in service. S7A.7.3.12 Requests for testing type 1 – 6 metering installations (a) If requested by a Registered Participant with a financial interest in the metering installation or the energy measured by the metering installation, the Metering Coordinator must make arrangements for the testing of the metering installation in accordance with clause 7A.7.2 of the Rules. (b) If requested by a Registered Participant with a financial interest in the metering installation, the Utilities Commission must make arrangements in accordance with clause 7A.7.4 of the Rules to determine the consistency of metering data held in the metering data services database and the energy data held in the type 1, 2, 3, 4, 4A, 5 and 6 metering installation. (c) Where the Registered Participant requests a metering installation test in accordance with paragraphs (a) and (b): (1) the Metering Coordinator or the Utilities Commission (as applicable) must use reasonable endeavours to conduct the test within 15 business days of the request; (2) if the requirement under subparagraph (1) would prevent the Registered Participant's customer witnessing the test, then the Metering Coordinator or the Utilities Commission may agree to a mutually convenient time to conduct the test; and

Regulations 2016 187 the Metering Data Provider must undertake type 19 substitutions as an interim until metering data can be collected from the metering installation or substituted; (f) the Metering Data Provider may only undertake substitution types 14, 15, 16, 17, 18, or 19 where substitution types 11, 12 and 13 are not applicable or cannot be carried out; (g) the Metering Data Provider may perform all substitution types except type 16 or 18 without the agreement of the affected financially responsible participant, Local Network Service Provider or relevant retailer and the Metering Data Provider may change the quality flag to an existing type 16 or 18 substitution without seeking further agreement from those parties; (h) the Metering Data Provider must notify the Local Network Service Provider, relevant retailer and the financially responsible participant for the connection point of any substitution within two business days of the substitution being carried out, and this notification is to be achieved via the participant metering data file as detailed in the MDFF Specification; (i) where there is a metering installation malfunction that cannot be repaired within the periods specified in clause 7A.6.9, the Metering Data Provider must: (1) where the metering installation malfunction is due to a failure of the meter to correctly record interval energy data and the Metering Coordinator has been granted an exemption to repair the metering installation, substitute the missing metering data in accordance with this Part; (2) for type 1-3 metering installations and other instrument transformer connected metering installations, and where a metering installation malfunction is due to a failure of the remote acquisition system, arrange for an alternative method for the collection of metering data from the metering installation in a timeframe that ensures the Metering Data Provider complies with metering data delivery requirements; or (3) for non-instrument transformer connected metering installations, and where a metering installation malfunction is due to a failure of the remote acquisition system, substitute the missing metering data in accordance with this Part;

Regulations 2016 190 Table 2 TYPE 15 The interval metering data to be substituted will be calculated using an average of the metering data from each corresponding interval from the preceding 4 weeks, or any part of those. This averaging technique may be applied in either of the following ways: (a) where the averaged interval metering data is used to provide the value for the metering data requiring substitution; (b) where the averaged interval metering data is used to provide the profile and is scaled to a pre-determined consumption value for the metering data to be substituted. Type 15 substitutions must not be used for public holidays. Type 16 – Agreed method (f) Where the Metering Data Provider is required to undertake substitution for any period greater than seven days for type 1 – 3 metering installations or greater than 15 days for other metering installation types, the Metering Data Provider must consult and use reasonable endeavours to reach an agreement with the financially responsible participants, relevant retailer and the Local Network Service Provider for the connection point. This may include changes to existing substitutions for any period where those affected parties have directed that as a result of site or end user information, the original substitutions are in error and a correction is required. Type 17 – Linear interpolation (g) To perform a type 17 substitution, the Metering Data Provider may substitute metering data for consecutive intervals up to, but not exceeding two hours, by using simple linear interpolation. Type 18 – Alternative (h) To perform a type 18 substitution, the Metering Data Provider may use an alternative method of substitution subject to agreement with the financially responsible participants, relevant retailer and the Local Network Service Provider for the connection point. The specifics of this substitution type may involve a globally applied method or a method where an adjusted profile is used to take into account local conditions that affect consumption (for example, local holiday or end user shutdown), or where alternative metering data may be available for quality checks, such as using metering register data.

Regulations 2016 194 Table 4 TYPE 52 (Alternative) The interval metering data for which substitution or estimation is to be carried out will be calculated using an average of the metering data from each corresponding interval from any part, or all, of the preceding 4 weeks. This averaging technique may be applied in either of the following ways: • where the averaged interval metering data is used to provide the value for the metering data requiring substitution or estimation; • where the averaged interval metering data is used to provide the profile and are scaled to a pre-determined consumption value for the metering data that are the subject of substitution or estimation. Type 52 substitutes or estimates must not be used for public holidays. Type 53 – Revision of substituted metering data (d) To perform a type 53 substitution, the Metering Data Provider must re-substitute or change substituted metering data to collecting an actual meter reading, where the financially responsible participant, the relevant retailer and the Local Network Service Provider have agreed, on the basis of site or end user information, that the original substituted metering data is in error and a correction is required. Type 54 – Linear interpolation (e) To perform a type 54 substitution, the Metering Data Provider may substitute metering data for intervals up to, but not exceeding 2 hours, by using simple linear interpolation. Type 55 – Agreed substitution method (f) To perform a type 55 substitution, the Metering Data Provider may undertake to use another method of substitution (which may be a modification of an existing substitution type), where none of the existing substitution types apply, subject to using reasonable endeavours to form an agreement with the financially responsible participant, the relevant retailer and Local Network Service Provider for the connection point. The specifics of this substitution type may involve a globally applied method. Type 56 – Prior to first reading – agreed method (g) Prior to the first actual meter reading and where no historical data exists for the connection point, the Metering Data Provider may provide a substitution or estimation for the interval metering data using a method agreed between the financially responsible participant, the relevant retailer and Local Network Service Provider.

Regulations 2016 229 (b) The register must be retained electronically for at least 13 months for each metering installation from when the details of the metering installation are first recorded in the register and may be archived after this period. (c) The register must be retained for at least 7 years for each metering installation from when the details of the metering installation are first recorded in the register and any archiving retrieval mechanisms must facilitate analysis and management of information using the same processing rules applied to the electronic register. (d) The Metering Provider must provide information from their register of metering installations to a party authorised to receive data in accordance with clause 7A.13.5 in a timeframe agreed with that party. S7A.8.7.2 Disaster recovery (a) The Metering Provider must establish and maintain a disaster recovery plan and business continuity processes that include: (1) detailed documentation that is maintained up to date, showing revisions and the date of the last review; (2) confirmation at least annually by the Metering Provider's management that the plan is current for the systems and processes in place; and (3) confirmation that the plan has been subjected to an annual end-to-end test that facilitates both a ‘fail-over' from and ‘recovery' back to the production system. (b) In the event of an IT system failure, the Metering Provider must ensure that systems are returned to normal operational service within 5 business days of the failure, as evidenced by: (1) the software and the most recent back-up of data being restored to operational service within the 5 business days; and (2) no outstanding processing or delivery of NT NMI Data to NTESMO and Registered Participants. (c) The Metering Provider must at its earliest opportunity notify NTESMO of any failure where the Metering Provider has a requirement to implement its disaster recovery plan. S7A.8.7.3 Audits undertaken by the Utilities Commission The Metering Provider must undertake all services in a manner that is auditable by the Utilities Commission and must provide all

Regulations 2016 241 (4) validate and deliver to NTESMO, Registered Participants and financially responsible participants all substituted metering data within 2 business days of the metering data being substituted; (5) ensure that all metering data is delivered to NTESMO, Registered Participants and financially responsible participants for the full period of any retrospectively created metering data streams within 2 business days of that metering data streams being created; and (6) for type 4A, 5, 6 and 7 metering installations, validate and deliver to NTESMO, Registered Participants and financially responsible participants all estimated metering data within 2 business days of the metering data being estimated. (e) Each Metering Data Provider must provide metering data to the relevant financially responsible participants within 2 business days of receiving a completed notification of a change of financially responsible participants, including estimated metering data, for a type 4A, 5, 6 or 7 metering installation. Review of failed validations (f) Each Metering Data Provider must ensure that all failed validations are reviewed promptly so as to: (1) where the initial review of the failed validation identifies that the actual meter readings are valid, deliver the actual meter readings to NTESMO, Registered Participants and financially responsible participants within 2 business days of the metering data being received into the metering data services database; and (2) where further information is required to validate the actual meter readings, and the receipt of such information identifies that the actual meter readings are valid, deliver the actual meter readings to NTESMO, Registered Participants and financially responsible participants within 2 business days of the metering data passing validation. Operational delays (g) The Metering Data Provider must notify NTESMO and affected Registered Participants immediately upon the identification of any operational delays impacting on normal metering data delivery.

Sch 7A1 within 10 business days of receiving the NMI under

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Occurring in the week preceding that in which the substitution day

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