{"id":"F2005B00571","name":"CASA 51/00 - Approval under subregulation 207 (2)","slug":"casa-51-00-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32010,"registerId":"commonwealth-F2005B00571-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 51/00 - Approval under subregulation 207 (2)","content":"INSTRUMENT NUMBER: CASA 51/00\n\nCIVIL AVIATION ACT 1988\n\nCIVIL AVIATION REGULATIONS 1988\n\nAPPROVAL UNDER SUBREGULATION 207 (2)\n\nI, EUGENE HOLZAPFEL, Manager, Technical Specialists, Certification Standards 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-TBZ 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 03 litre per minute at 10,000 feet altitude, increasing by 0.1 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 E. Holzapfel\\]\n\nEugene Holzapfel\n\nManager Technical Specialists\n\nCertification Standards\n\n14 February 2000","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a discrete, single-purpose instrument of approval. It has not expanded beyond its original intent, which was to grant a specific exemption for one aircraft to use a particular oxygen delivery system under defined conditions."},"complexity_factors":["Single, specific approval applying to one aircraft only (VH-TBZ)","Only two operational conditions with straightforward technical specifications","No defined terms section or interpretation provisions","Minimal cross-referencing (only to Civil Aviation Orders section 108.26)","No nested exceptions or conditional logic beyond the two simple provisos","Document is 1 page with approximately 150 words"],"plain_english_summary":"This is a specific approval issued by the Civil Aviation Safety Authority (CASA) allowing a particular aircraft (registration VH-TBZ) to use a specific type of oxygen delivery device called an \"Oxymizer\" for passengers or crew who need supplemental oxygen.\n\n**What it does:**\n- Permits the use of nasal cannula oxygen units (small tubes that sit in the nostrils) instead of the usual full face masks that cover nose and mouth\n- Sets strict technical requirements for how much oxygen these units must deliver at different altitudes\n- Requires that standard face-mask oxygen units must still be available on the aircraft as backup\n\n**Who it affects:**\n- The operator of aircraft VH-TBZ\n- Passengers and crew who may need oxygen during flight\n- CASA, which oversees aviation safety standards\n\n**Why it matters:**\nNormally, aviation regulations require oxygen masks that cover both nose and mouth. This approval creates an exception for this specific aircraft to use lighter, more comfortable nasal cannulas instead—but only if they meet precise flow-rate requirements and the aircraft still carries standard masks as well. It's a tailored safety approval that balances passenger comfort with strict medical and safety standards."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This instrument does not indicate any change to the general scope of the Civil Aviation Regulations or Civil Aviation Orders. It is a targeted approval under subregulation 207(2) allowing the aircraft VH-TBZ to operate with a named nasal-cannula oxygen device provided the instrument’s two conditions are met (specified flow-rate profile and compliance of other nose-and-mouth units with paragraph 6.1 and paragraph 5.1.2 of section 108.26 of the Civil Aviation Orders). The instrument therefore confines its effect to a single aircraft registration and specific compliance requirements rather than altering the underlying regulatory framework. (CASA 51/00, entire text)"},"complexity_factors":["Narrow, aircraft-specific scope reduces cross-cutting complexity (approval applies only to VH-TBZ).","Technical condition requires a specific altitude-linked flow-rate profile (0.3 L/min at 10,000 ft, +0.1 L/min per 2,000 ft to 18,000 ft), which is precise but limited in number of parameters (one performance curve). (CASA 51/00, condition (a))","Reference to external provisions (paragraph 6.1 and paragraph 5.1.2 of section 108.26 of the Civil Aviation Orders) requires cross-referencing another instrument to fully determine compliance obligations. (CASA 51/00, condition (b))","Delegated decision-making is explicit (approval by a CASA delegate under subregulation 207(2)); understanding authority lines requires familiarity with delegation practice. (CASA 51/00, opening and signature)","No broad regulatory change or multiple stakeholder regimes to reconcile — simplicity of purpose lowers complexity."],"plain_english_summary":"This instrument grants a CASA delegate’s approval for the Oxymizer nasal‑cannula oxygen unit to be used only on aircraft VH‑TBZ, subject to specified flow‑rate performance by altitude and compliance rules for any other nose‑and‑mouth units. It affects the aircraft operator/crew, who must procure, verify and maintain equipment to meet the conditions. The approval is narrow and aircraft‑specific, not a general regulatory change."}},"importantCases":[],"_links":{"self":"/api/acts/casa-51-00-approval-under-subregulation-207-2","history":"/api/acts/casa-51-00-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-51-00-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-51-00-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-51-00-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-51-00-approval-under-subregulation-207-2/documents"}}