{"id":"F2005B00975","name":"CASA 284/97 - Approval under subregulation 207(2)","slug":"casa-284-97-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32381,"registerId":"commonwealth-F2005B00975-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 284/97 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 284/97\n\nCIVIL AVIATION ACT 1988\n\nCIVIL AVIATION REGULATIONS\n\nAPPROVAL UNDER SUBREGULATION 207 (2)\n\nI, FRANK RICHARD HAMILTON GRIMSHAW, General Manager, Airworthiness Branch, CASA, a delegate of CASA, under subregulation 207 (2) of the Civil Aviation Regulations approve the operation of the aircraft bearing the nationality and registration marks VH-LLV with nasal cannula type individual oxygen dispensing units manufactured under the name “Oxymizer”, providing that:\n\n(a) the units have a flow rate of not less than 3 litre per minute at 10,000 feet altitude, increasing by .1 litre per minute for every 2,000 feet up to 18,000 feet altitude; and\n\n(b) other individual oxygen dispensing units for use in the aircraft, that are designed to cover the nose and mouth, meet the requirements of paragraph 6.1 of section 108.26 of the Civil Aviation Orders and are provided in accordance with paragraph 5.1.2 of that section.\n\n\\[Signed Frank Richard Hamilton Grimshaw\\]\n\nFRANK RICHARD HAMILTON GRIMSHAW\n\nGeneral Manager\n\nAirworthiness Branch\n\n13 November 1997","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific delegated legislative instrument issued under subregulation 207(2) of the Civil Aviation Regulations. It performs exactly the function intended by that provision: granting a specific approval for a specific aircraft with specific conditions. There is no scope creep; it is a narrow, technical approval consistent with the original regulatory framework."},"complexity_factors":["Single-purpose instrument: grants one specific approval for one aircraft","Only two operative conditions (paragraphs a and b)","No defined terms section","No cross-references to other legislation beyond the enabling regulation (subregulation 207(2)) and one external standard (CAO 108.26)","Straightforward conditional logic: approval granted IF conditions (a) and (b) are met","Total length: approximately 150 words of operative text"],"plain_english_summary":"This is a specific approval issued by the Civil Aviation Safety Authority (CASA) in 1997 allowing a particular aircraft (registration VH-LLV) to use a specific type of oxygen delivery device called an \"Oxymizer\" during flight.\n\n**What it does:**\nNormally, aviation regulations require certain oxygen equipment to cover both the nose and mouth. This approval grants an exception for aircraft VH-LLV to use nasal cannula devices (tubes that sit in the nostrils) instead, but only under strict conditions.\n\n**Who it affects:**\n- The operator of aircraft VH-LLV\n- Pilots and passengers using oxygen on this specific aircraft\n\n**The conditions:**\n- The Oxymizer units must deliver at least 0.3 litres of oxygen per minute at 10,000 feet, increasing by 0.1 litres per minute for every 2,000 feet of altitude gain, up to 18,000 feet\n- The aircraft must still carry backup oxygen masks that cover the nose and mouth, meeting specific technical standards (Civil Aviation Orders section 108.26)\n\n**Why it matters:**\nThis is a tailored safety exemption. Nasal cannulas are more comfortable than full masks, but they don't work as well at high altitudes. CASA approved their use for this specific aircraft only because the operator demonstrated they could maintain adequate oxygen flow at altitude, provided backup equipment was available."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument is a limited, conditional approval for a single aircraft (VH-LLV) to use a specified type of nasal-cannula oxygen device (Oxymizer) and does not change underlying regulations. It does not amend the Civil Aviation Regulations or the Civil Aviation Orders; it grants a specific operating permission subject to prescribed technical and cross-referenced requirements (instrument header; conditions (a) and (b))."},"complexity_factors":["Narrow, aircraft-specific approval (single registration VH-LLV) reduces scope and legal complexity","Altitude-based flow-rate formula requires technical measurement/verifiability (condition (a))","Cross-reference to external Civil Aviation Orders (section 108.26, paragraphs 6.1 and 5.1.2) creates reliance on another instrument for full compliance (condition (b))","Delegated discretionary power under subregulation 207(2) introduces administrative discretion but no legislative amendment (instrument header)"],"plain_english_summary":"This delegated CASA approval lets aircraft VH-LLV use Oxymizer nasal‑cannula oxygen units, provided they meet an altitude‑indexed minimum flow schedule and any other nose‑and‑mouth oxygen units on board comply with specified Civil Aviation Orders. \n\nIt affects the aircraft owner/operator and equipment suppliers, who must supply, verify and maintain devices to the flow‑rate and CAO requirements—creating compliance, testing and equipment costs while authorising a specific device for that aircraft."}},"importantCases":[],"_links":{"self":"/api/acts/casa-284-97-approval-under-subregulation-207-2","history":"/api/acts/casa-284-97-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-284-97-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-284-97-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-284-97-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-284-97-approval-under-subregulation-207-2/documents"}}