{"id":"F2005B00667","name":"CASA 847/99 - Approval under subregulation 207(2)","slug":"casa-847-99-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32138,"registerId":"commonwealth-F2005B00667-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 847/99 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 847/99\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-DWW 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\n20 July 1999","sortOrder":0}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument grants a specific, conditional approval for the listed nasal cannula equipment on a single aircraft (VH‑DWW). It does not amend the underlying Regulations or Civil Aviation Orders, nor does it purport to create a general class approval for other aircraft. The scope is therefore a targeted, single‑aircraft approval rather than a change to broader regulatory scope."},"complexity_factors":["Specific, narrow scope confined to a single aircraft registration (VH‑DWW)","Requirement involves a simple numeric flow‑rate schedule tied to altitude (0.3 L/min at 10,000 ft, +0.1 L/min per 2,000 ft up to 18,000 ft)","Cross‑references to external Civil Aviation Orders (section 108.26, paras 6.1 and 5.1.2) create reliance on other documents to determine full compliance","Delegated decision‑making under subregulation 207(2) (administrative discretion in CASA’s delegation framework)","Operational compliance and verification rest with the aircraft operator and CASA enforcement mechanisms"],"plain_english_summary":"This instrument is a targeted CASA approval, signed by an Airworthiness Branch delegate, authorising the Oxymizer nasal‑cannula oxygen device for use only on aircraft VH‑DWW subject to specified altitude‑linked flow‑rate conditions and cross‑referenced CAO requirements. The aircraft operator must procure, install, maintain and verify compliance with those technical conditions and bears any related costs; the approval applies only to that registration."},"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific individual approval instrument with narrow, targeted scope from inception. It was always intended to apply only to aircraft VH-DWW and the Oxymizer device. There is no indication of scope creep as this is a one-off administrative approval rather than a legislative instrument of general application."},"complexity_factors":["Very short document (under 200 words)","Only 2 operative conditions (paragraphs a and b)","Single cross-reference to Civil Aviation Orders section 108.26","No defined terms section","Simple conditional structure (approval granted subject to two specific requirements)","Applies to only one specific aircraft (VH-DWW) and one specific device type"],"plain_english_summary":"This is a specific approval from Australia's aviation safety regulator (CASA) allowing a particular aircraft (registration VH-DWW) to use a specific type of oxygen delivery device called an \"Oxymizer\" nasal cannula.\n\n**What it does:**\n- Permits the aircraft to use nasal cannula oxygen units instead of the standard full face masks that cover nose and mouth\n- Sets strict technical conditions: the Oxymizer units must deliver at least 0.3 litres of oxygen per minute at 10,000 feet, with increasing flow at higher altitudes (up to 18,000 feet)\n- Requires backup: the aircraft must still carry standard oxygen masks that cover nose and mouth, and these must meet specific technical standards in the Civil Aviation Orders\n\n**Who it affects:**\n- The operator of aircraft VH-DWW\n- Passengers and crew on that specific aircraft who might need supplemental oxygen\n\n**Why it matters:**\nNasal cannulas are generally more comfortable than full face masks, but they're not automatically approved for aviation use because they may not deliver enough oxygen at altitude. This approval allows an exception for this specific aircraft and device combination, provided safety backups remain in place. It's an example of how aviation safety rules can be adapted for specific cases while maintaining strict conditions."}},"importantCases":[],"_links":{"self":"/api/acts/casa-847-99-approval-under-subregulation-207-2","history":"/api/acts/casa-847-99-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-847-99-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-847-99-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-847-99-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-847-99-approval-under-subregulation-207-2/documents"}}