{"id":"F2009B00169","name":"National Measurement Act 1960 - para 8A(1)(a) and (b) - Determination by the National Standards Commission - Recognized-Value Standard of Measurement of Acceleration Due to Gravity","slug":"national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":121573,"registerId":"commonwealth-F2009B00169-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"National Measurement Act 1960 - para 8A(1)(a) and (b) - Determination by the National Standards Commission - Recognized-Value Standard of Measurement of Acceleration Due to Gravity","content":"national measurement act 1960\n\ndetermination by the national standards commission\n\nRecognized-Value Standard of Measurement\n\nof Acceleration due to Gravity\n\nIn pursuance of paragraph 8A(1) (a) and (b) of the National Measurement Act 1960, the National Standards Commission hereby determines that the acceleration in vacuum of a body due to the gravitational attraction of the earth at the locations specified in the report 207, entitled Australian Gravity Network Adjustment 1975, of the Bureau of Mineral Resources Geology and Geophysics, shall be a recognized-value standard of measurement, the magnitude of the acceleration in m.s\\-2 being the value in milligals specified for those locations in that Report multiplied by 10\\-5 \n\nFor the purposes of the Determination the chance is not more than one in one hundred that the magnitude of the acceleration so ascertained differs from the true magnitude by more than 0.000 01 m.s\\-2 \n\nDated this 21st day of March 1985\n\nThe common seal of the national T.J. PETRY\n\nstandards commission was hereto\n\naffixed by authority of the\n\nCommission in the presence of","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2017},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The determination maintains its original narrow scope of establishing recognized-value standards for gravitational acceleration at specified locations, precisely as authorized by section 8A of the National Measurement Act 1960."},"complexity_factors":["Single external reference to technical scientific report (Report 207, Australian Gravity Network Adjustment 1975)","Simple mathematical conversion requirement (milligals to metres per second squared)","Technical scientific terminology (milligals, acceleration due to gravity, vacuum conditions)","Statistical uncertainty clause specifying confidence intervals (1 in 100 chance tolerance)"],"plain_english_summary":"This legal instrument sets an official national standard for measuring **acceleration due to gravity** (how fast objects fall) at specific locations across Australia.\n\nUnder the National Measurement Act, the National Standards Commission can create \"recognized-value standards\" — legally approved reference values for specific measurements. This determination adopts gravity data from a 1975 geological survey (*Australian Gravity Network Adjustment 1975*, Report 207) and converts the values from a specialized scientific unit called **milligals** into standard metric units (metres per second squared, or m/s²) by multiplying by 10⁻⁵ (0.00001).\n\nThe instrument also specifies accuracy: there is a 99% probability that the stated values are within **0.00001 m/s²** of the true gravitational acceleration at each location.\n\n**Why this matters:** Precise gravity measurements are essential for mineral exploration, geophysical research, and engineering surveys. This ensures scientists and industry professionals use consistent, legally recognized values when measuring gravitational pull across Australia."}},"importantCases":[],"_links":{"self":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r","history":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r/history","analysis":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r/analysis","conflicts":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r/conflicts","importantCases":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r/important-cases","documents":"/api/acts/national-measurement-act-1960-para-8a-1-a-and-b-determination-by-the-national-standards-commission-r/documents"}}