{"id":"F2005B00958","name":"CASA 417/98 - Approval under subregulation 207(2)","slug":"casa-417-98-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32364,"registerId":"commonwealth-F2005B00958-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 417/98 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 417/98\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‑MDN 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\n22 October 1998","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a specific individual approval instrument issued under subregulation 207(2) of the Civil Aviation Regulations. It applies only to aircraft VH-MDN and the specific equipment described. As a single-case approval, it has no broader scope to expand beyond its original purpose."},"complexity_factors":["Single purpose instrument with only two operative conditions","No defined terms section","Minimal cross-referencing (only to subregulation 207(2) and specific paragraphs of Civil Aviation Orders)","Straightforward conditional logic (approval granted subject to two specific requirements)","Length: approximately 150 words of operative text","No nested exceptions or complex temporal provisions"],"plain_english_summary":"This is a specific approval from the Civil Aviation Safety Authority (CASA) allowing a particular aircraft (registration VH-MDN) to use a specific type of oxygen delivery device called an \"Oxymizer\" for passengers or crew.\n\n**What it does:**\nNormally, aviation regulations require certain types of oxygen masks that cover both nose and mouth. This document gives special permission for VH-MDN to use nasal cannulas (small tubes that sit in the nostrils) instead—but only if two conditions are met:\n\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 standard oxygen masks (the kind covering nose and mouth) that meet specific technical standards set out in the Civil Aviation Orders.\n\n**Who it affects:**\nThe owner/operator of aircraft VH-MDN, and potentially passengers and crew who would use these oxygen systems during flight.\n\n**Why it matters:**\nThis is an example of how aviation safety regulators can grant exemptions or alternative compliance paths when new or different equipment can achieve equivalent safety outcomes. The nasal cannulas are likely more comfortable or convenient, but CASA ensures safety by requiring specific performance standards and maintaining backup equipment that meets the usual rules."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument does not change the underlying Civil Aviation Regulations; it grants a specific approval under subregulation 207(2) for the operation of the aircraft VH‑MDN with named nasal cannula oxygen units subject to two technical conditions (see conditions (a) and (b)). It therefore narrows its effect to a single aircraft and specified equipment rather than altering general regulatory scope."},"complexity_factors":["Very narrow, single‑aircraft scope (approval applies only to VH‑MDN).","Technical flow‑rate requirement with altitude‑based increments (condition (a)).","Cross‑reference to external material standards (Civil Aviation Orders section 108.26, paragraphs 6.1 and 5.1.2) requiring users to consult and apply another instrument.","Use of delegated administrative authority (decision rendered by CASA delegate) which requires reading the instrument alongside subregulation 207(2)."],"plain_english_summary":"This approval (dated 22 Oct 1998, signed by a CASA delegate) authorises aircraft VH‑MDN to carry and use Oxymizer nasal‑cannula oxygen units. It requires the units to meet a specified altitude‑dependent flow‑rate profile and any other nose‑and‑mouth oxygen devices to comply with the referenced Civil Aviation Orders. Operators/maintainers of VH‑MDN must ensure those technical standards are met."}},"importantCases":[],"_links":{"self":"/api/acts/casa-417-98-approval-under-subregulation-207-2","history":"/api/acts/casa-417-98-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-417-98-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-417-98-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-417-98-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-417-98-approval-under-subregulation-207-2/documents"}}