{"id":"F2005B00959","name":"CASA 476/98 - Approval under subregulation 207(2)","slug":"casa-476-98-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32365,"registerId":"commonwealth-F2005B00959-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 476/98 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 476/98\n\nCIVIL AVIATION ACT 1988\n\nCIVIL AVIATION REGULATIONS\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 approve the operation of the aircraft bearing the nationality and registration marks VH‑CAH 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\n26 November 1998","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific individual approval instrument under subregulation 207(2) of the Civil Aviation Regulations. It has not expanded beyond its original purpose; it remains a narrow, single-aircraft exemption from standard oxygen equipment requirements."},"complexity_factors":["Single purpose instrument (one aircraft, one specific device)","Only two operational conditions (flow rates and backup equipment)","No defined terms section","No cross-references to other legislation beyond the enabling regulation and Civil Aviation Orders","Straightforward conditional logic (approval granted IF conditions met)","Length: approximately 150 words"],"plain_english_summary":"This is a specific approval from the Civil Aviation Safety Authority (CASA) allowing a particular aircraft (registration VH‑CAH) to use a specific type of oxygen delivery device called an \"Oxymizer\" nasal cannula.\n\n**What it does:**\nNormally, aviation oxygen equipment must cover both nose and mouth. This approval creates an exception for aircraft VH‑CAH, permitting passengers to use nasal cannulas (tubes that sit in the nose only) instead of full face masks.\n\n**Conditions attached:**\n*   **Flow rate requirement:** The Oxymizer units must deliver at least 0.3 litres of oxygen per minute at 10,000 feet altitude, and increase by 0.1 litres per minute for every 2,000 feet of additional altitude up to 18,000 feet.\n*   **Backup requirement:** The aircraft must still carry traditional oxygen masks (nose-and-mouth covering type) that meet specific technical standards in the Civil Aviation Orders, and these must be available for use.\n\n**Who it affects:**\n*   The operator/owner of aircraft VH‑CAH\n*   Passengers and crew on that specific aircraft who need supplemental oxygen\n\n**Why it matters:**\nThis is a tailored safety approval. It allows more comfortable nasal oxygen delivery while ensuring safety through strict flow-rate controls and mandatory backup equipment. It shows how aviation regulators can grant specific exemptions from standard rules when alternative safety measures are proven adequate."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":true,"description":"This approval modifies the set of oxygen-dispensing equipment permitted on the named aircraft (VH‑CAH) by authorising nasal-cannula ‘Oxymizer’ units subject to a specified flow-rate schedule (condition (a)), while preserving requirements for mask-style units via cross-reference to Civil Aviation Orders (condition (b)). In practical terms, it expands permitted equipment for VH‑CAH to include a nasal-only device under defined technical conditions, rather than relying solely on devices that cover nose and mouth."},"complexity_factors":["Very narrow, single-aircraft scope (VH‑CAH) reduces breadth of legal application.","Contains a simple technical requirement: a linear flow-rate schedule (0.3 L/min at 10,000 ft, +0.1 L/min per 2,000 ft up to 18,000 ft). (condition (a))","Cross-references external material (paragraphs 6.1 and 5.1.2 of section 108.26 of the Civil Aviation Orders), requiring the reader to consult another instrument for full compliance details. (condition (b))","Issued under a specific delegated power (subregulation 207(2)), which constrains legal basis but is straightforward to identify.","No procedural or recordkeeping provisions included, which simplifies the instrument but leaves implementation detail to other rules or practice."],"plain_english_summary":"This is a targeted CASA approval allowing a single Australian‑registered aircraft (VH‑CAH) to use Oxymizer nasal‑cannula individual oxygen units, issued by a CASA delegate. It conditions use on minimum flow rates (≥0.3 L/min at 10,000 ft, increasing 0.1 L/min per 2,000 ft up to 18,000 ft) and requires any nose‑and‑mouth oxygen units onboard to meet Civil Aviation Orders section 108.26. The operator must supply and maintain compliant equipment."}},"importantCases":[],"_links":{"self":"/api/acts/casa-476-98-approval-under-subregulation-207-2","history":"/api/acts/casa-476-98-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-476-98-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-476-98-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-476-98-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-476-98-approval-under-subregulation-207-2/documents"}}