{"id":"F2026L00237","name":"National Measurement (Recognized-Value Standard of Measurement of Acceleration due to Gravity – Lindfield, NSW) Determination 2026","slug":"national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":443185,"registerId":"F2026L00237-fast-fetch-1775958092312","compilationNumber":null,"startDate":"2026-04-12","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"National Measurement (Recognized-Value Standard of Measurement of Acceleration due to Gravity – Lindfield, NSW) Determination 2026","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n![Commonwealth Coat of Arms of Australia](image.001.jpeg)\n\n \n\nNational Measurement (Recognized-Value Standard of Measurement of Acceleration due to Gravity – Lindfield, NSW) Determination 2026\n\nI, Dr Victoria Anne Coleman, Chief Metrologist, National Measurement Institute, make the following determination.\n\nDated  9 March 2026    \n\n \n\nDr Victoria Anne Coleman\n\nChief Metrologist\n\n \n\n \n\n \n\nContents\n\n1  Name\n\n2  Commencement\n\n3  Authority\n\n4  Schedules\n\n5  Definitions\n\n6  Recognized-Value Standard of Measurement of Acceleration due to Gravity\n\nSchedule 1—Repeals\n\n \n\n \n\n1  Name\n\n  This instrument is the National Measurement (Recognized-Value Standard of Measurement of Acceleration due to Gravity – Lindfield, NSW) Determination 2026.\n\n2  Commencement\n\n1.   Each provision of this instrument specified in column 1 of the table commences, or is taken to have commenced, in accordance with column 2 of the table. Any other statement in column 2 has effect according to its terms.\n\n\n \n\n- Commencement information\n- Column 1 Column 2 Column 3\n- Provisions Commencement Date/Details\n- The whole of this instrument The day after this instrument is registered.\n\n\nNote: This table relates only to the provisions of this instrument as originally made. It will not be amended to deal with any later amendments of this instrument.\n\n1.    Any information in column 3 of the table is not part of this instrument. Information may be inserted in this column, or information in it may be edited, in any published version of this instrument.\n\n\n3  Authority\n\n  This instrument is made under paragraph 8A(1)(a) of the National Measurement Act 1960.\n\n4  Schedules\n\n  Each instrument that is specified in a Schedule to this instrument is amended or repealed as set out in the applicable items in the Schedule concerned, and any other item in a Schedule to this instrument has effect according to its terms.\n\n5  Definitions\n\nNote: Recognized-value standard of measurement is defined in the Act.  \n\nIn this instrument:\n\nAct means the National Measurement Act 1960.\n\n6  Recognized-Value Standard of Measurement of Acceleration due to Gravity\n\n1.     The magnitude of the acceleration in a vacuum of a body due to the gravitational attraction of the earth at the benchmark inscribed “Absolute Gravity Station 200498.9905, Sydney, Commonwealth of Australia” installed in room C269 of the National Measurement Institute, 36 Bradfield Road, West Lindfield, NSW, is a Recognized-Value Standard of Measurement having a value of 9.7963779533 m·s-2 with an expanded uncertainty of 106 ×10-9 m·s-2. \n\n\n Note: The expanded uncertainty is based on a standard uncertainty multiplied by a coverage factor k=2, providing a level of confidence of 95%.\n\n\n\n\nSchedule 1—Repeals\n\nNational Measurement Act 1960 - para 8A(1)(a) - Determination by the National Standards Commission - Recognized-Value Standard of Measurement of Acceleration Due to Gravity\n\n1  The whole of the determination\n\nRepeal the determination\n\n \n\n \n","sortOrder":0}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument performs exactly the function intended by section 8A(1)(a) of the National Measurement Act 1960: establishing a recognized-value standard for a specific physical measurement. It replaces a previous determination with updated values, which is the standard lifecycle for metrological standards. No scope creep is evident."},"complexity_factors":["Very short instrument (only 6 substantive sections plus a repeal schedule)","Only 1 defined term ('Act')","Single technical measurement with minimal conditional logic","No cross-references to other legislation beyond the empowering provision (National Measurement Act 1960)","Straightforward repeal of one previous instrument in Schedule 1","Technical complexity limited to the physics notation (m·s⁻², expanded uncertainty) which is explained in the note"],"plain_english_summary":"This instrument legally recognizes a precise value for the acceleration due to gravity at the National Measurement Institute’s Absolute Gravity Station in Lindfield, NSW: 9.7963779533 m·s⁻² (with a very small expanded uncertainty). \n\nIt matters to scientists, surveyors and calibration labs — and to the NMI — as the official Australian reference for gravimeter calibration and geophysical work, replacing the previous determination."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"Yes. Schedule 1 repeals the earlier Determination and replaces it with this instrument’s declared recognized‑value for gravity at the NMI Lindfield benchmark (s6(1) and Schedule 1). The change substitutes the prior legal standard with a new, location‑specific numeric value and uncertainty without extending regulatory scope beyond metrology standards."},"complexity_factors":["Technical precision: specifies a high‑precision numeric value and an expanded uncertainty (s6(1)) requiring metrology expertise to interpret.","Legal formality: made under statutory power (para 8A(1)(a)) and follows formal commencement rules (s3, s2).","Location specificity: applies to a single physical benchmark at NMI West Lindfield (s6(1)), so legal effect is narrow but technically exact.","Document update: expressly repeals a prior determination (Schedule 1), creating a direct substitution rather than an incremental change.","Dependence on Act definitions: relies on the Act’s concept of a Recognized‑Value Standard (s5 note), linking to broader statutory traceability rules."],"plain_english_summary":"This instrument declares an official measured value for acceleration due to gravity at the benchmark in room C269 of the National Measurement Institute, West Lindfield, NSW, and records its expanded uncertainty (s6(1)).\n\nMade by the Chief Metrologist under paragraph 8A(1)(a) of the National Measurement Act (s3), it provides an authoritative reference for laboratories and calibration services to use for traceability; Schedule 1 repeals the prior determination."}},"importantCases":[],"_links":{"self":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie","history":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie/history","analysis":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie/analysis","conflicts":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie/conflicts","importantCases":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie/important-cases","documents":"/api/acts/national-measurement-recognized-value-standard-of-measurement-of-acceleration-due-to-gravity-lindfie/documents"}}