{"id":"F2005B00658","name":"CASA 223/99 - Approval under subregulation 207(2)","slug":"casa-223-99-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32133,"registerId":"commonwealth-F2005B00658-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 223/99 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 223/99\n\nCIVIL AVIATION ACT 1988\n\nCIVIL AVIATION REGULATIONS 1988\n\nAPPROVAL UNDER SUBREGULATION 207 (2)\n\nI, DAVID ALAN VILLIERS, Acting General Manager, Airworthiness Branch, CASA, a delegate of CASA, under subregulation 207 (2) of the Civil Aviation Regulations 1988 approve the operation of the aircraft bearing the nationality and registration marks VH-TYO 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 D.A. Villiers\\]\n\nDavid Alan Villiers\n\nActing General Manager\n\nAirworthiness\n\n18 May 1999","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument authorises, for a single aircraft registration (VH-TYO), the operation of a named nasal‑cannula oxygen device (Oxymizer) that would otherwise not be covered by the standard requirement that individual oxygen dispensing units cover the nose and mouth. The approval substitutes a specific technical performance requirement for that device (paragraph (a)) while retaining the requirement that other carried oxygen units meet the relevant Civil Aviation Orders (paragraph (b)). The change is therefore limited in scope to a particular aircraft and device and does not, on its face, alter the general regulatory requirements for other aircraft."},"complexity_factors":["Narrow, single‑aircraft approval limits breadth but requires precise technical compliance (flow‑rate formula in paragraph (a)).","Cross‑reference to external Civil Aviation Orders (section 108.26, paragraphs 6.1 and 5.1.2) requires consulting another instrument to verify full compliance.","Delegated administrative discretion (approval under subregulation 207(2)) introduces potential for case‑by‑case variation across operators.","Operational compliance requires altitude‑dependent performance verification, which adds technical testing and recordkeeping burden."],"plain_english_summary":"This instrument authorises the specific aircraft VH‑TYO to use an Oxymizer nasal‑cannula oxygen device, subject to a performance requirement (≥0.3 L/min at 10,000 ft, increasing 0.1 L/min per 2,000 ft to 18,000 ft) and the carriage of other oxygen units that meet cited Civil Aviation Orders.\n\nIssued by a CASA delegate under subregulation 207(2), the approval imposes compliance, testing and cost burdens on the aircraft operator."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific administrative approval instrument issued under existing regulations. It does not represent legislation that has grown beyond original intent; it is a routine delegation exercise permitting specific equipment on a specific aircraft under defined conditions."},"complexity_factors":["Single specific approval for one aircraft (VH-TYO)","Only two operational conditions with straightforward technical specifications","No defined terms section","No cross-references to other legislation beyond one reference to Civil Aviation Orders section 108.26","Document is 1 page with simple conditional structure (if using Oxymizer, then must meet flow rates and carry backup masks)","No nested exceptions or complex logical structures"],"plain_english_summary":"This is a specific approval from the Civil Aviation Safety Authority (CASA) allowing a particular aircraft (registration VH-TYO) to use a specific type of oxygen delivery device called an \"Oxymizer\" during flight.\n\n**What it does:**\n- Permits the aircraft to use nasal cannula oxygen units (tubes that sit in the nose) instead of the usual full face masks that cover nose and mouth\n- Sets strict conditions on how these units must perform at different altitudes\n\n**Who it affects:**\n- The operator of aircraft VH-TYO\n- Passengers and crew on that specific aircraft who might need supplemental oxygen\n\n**The conditions:**\n- The Oxymizer units must deliver at least 0.3 litres of oxygen per minute when flying at 10,000 feet\n- This flow rate must increase by 0.1 litres per minute for every 2,000 feet of additional altitude, up to 18,000 feet\n- The aircraft must still carry backup full face masks (the kind that cover nose and mouth) that meet specific technical standards in the Civil Aviation Orders\n\n**Why it matters:**\nThis is a safety approval allowing more flexible oxygen equipment on this specific aircraft, provided backup safety equipment is available. It shows how aviation regulators grant tailored approvals for specific equipment on specific aircraft when safety conditions are met."}},"importantCases":[],"_links":{"self":"/api/acts/casa-223-99-approval-under-subregulation-207-2","history":"/api/acts/casa-223-99-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-223-99-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-223-99-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-223-99-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-223-99-approval-under-subregulation-207-2/documents"}}