{"id":"F2005B00980","name":"CASA 199/97 - Approval under subregulation 207(2)","slug":"casa-199-97-approval-under-subregulation-207-2","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32386,"registerId":"commonwealth-F2005B00980-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 199/97 - Approval under subregulation 207(2)","content":"INSTRUMENT NUMBER: CASA 199/97\n\nCIVIL AVIATION ACT 1988\n\nCIVIL AVIATION REGULATIONS\n\nAPPROVAL UNDER SUBREGULATION 207 (2)\n\nI, FRANK RICHARD HAMILTON GRIMSHAW, General Manager, Airworthiness Branch, CASA, a delegate of CASA, under subregulation 207 (2) of the Civil Aviation Regulations:\n\n(1) revoke instrument number CASA 187/97; and\n\n(2) approve the operation of the aircraft bearing the nationality and registration marks VH-TSJ 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 Frank Grimshaw\\]\n\nFRANK RICHARD HAMILTON GRIMSHAW\n\nGeneral Manager\n\nAirworthiness Branch\n\n19 August 1997","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This is a standard single-aircraft equipment approval instrument. It has not expanded beyond its original purpose of approving specific oxygen equipment for a specific aircraft under specific conditions."},"complexity_factors":["Single purpose instrument (one aircraft, one specific equipment type)","Only 2 operative paragraphs with straightforward conditions","Minimal cross-referencing (only to Civil Aviation Orders section 108.26)","No defined terms section","Simple conditional structure (if altitude X, then flow rate Y)","Total length under 200 words"],"plain_english_summary":"This is a specific approval from the Civil Aviation Safety Authority (CASA) allowing a particular aircraft (registration VH-TSJ) to use a specific type of oxygen equipment called \"Oxymizer\" nasal cannulas.\n\n**What it does:**\n- Revokes a previous approval (CASA 187/97)\n- Grants new approval for the aircraft VH-TSJ to use Oxymizer nasal cannulas instead of traditional oxygen masks\n\n**The conditions:**\n- The Oxymizer units must deliver oxygen at specific flow rates that increase with altitude (starting at 0.3 litres per minute at 10,000 feet, going up by 0.1 litres per minute for every 2,000 feet up to 18,000 feet)\n- The aircraft must still carry traditional oxygen masks (the kind that cover nose and mouth) that meet Civil Aviation Orders standards, as backup\n\n**Who it affects:**\n- The operator of aircraft VH-TSJ\n- Passengers and crew on that specific aircraft who need supplemental oxygen\n\n**Why it matters:**\nNasal cannulas are generally more comfortable than full face masks, but they need specific safety approvals because they don't seal as well. This instrument allows that specific aircraft to use the more comfortable equipment while ensuring safety through strict flow rate requirements and backup mask requirements."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":true,"description":"This instrument explicitly revokes an earlier instrument (CASA 187/97) and replaces it with a new approval that applies to the specific aircraft VH-TSJ and to the named nasal-cannula product Oxymizer, subject to defined flow-rate minima and cross-referenced CAO requirements (clauses (1) and (2); subclauses (2)(a) and (2)(b)). The revocation and re-approval indicate a change from the prior instrument’s scope or conditions to the scope and conditions set out here."},"complexity_factors":["Very narrow, aircraft-specific scope (single registration VH-TSJ) reduces breadth of legal application.","Technical performance requirement (specified minimum oxygen flow rates by altitude) requires technical understanding and verification.","Cross-references to Civil Aviation Orders (section 108.26 paras 6.1 and 5.1.2) add dependency on external, more detailed regulatory text.","Administrative action by a CASA delegate (revocation of a prior instrument and grant of a new approval) introduces some procedural and discretionary elements.","Short instrument text with few operative clauses limits interpretive ambiguity overall."],"plain_english_summary":"This instrument, made by a CASA delegate, revokes a prior approval and authorises use of Oxymizer nasal‑cannula oxygen units on the single aircraft VH‑TSJ, subject to specified minimum flow rates by altitude and compliance with cited Civil Aviation Orders for nose‑and‑mouth devices.  \n\nIt matters to the VH‑TSJ operator (who must procure, test and maintain compliant units and adjust oxygen provisioning) and reflects CASA delegate discretion over equipment approvals."}},"importantCases":[],"_links":{"self":"/api/acts/casa-199-97-approval-under-subregulation-207-2","history":"/api/acts/casa-199-97-approval-under-subregulation-207-2/history","analysis":"/api/acts/casa-199-97-approval-under-subregulation-207-2/analysis","conflicts":"/api/acts/casa-199-97-approval-under-subregulation-207-2/conflicts","importantCases":"/api/acts/casa-199-97-approval-under-subregulation-207-2/important-cases","documents":"/api/acts/casa-199-97-approval-under-subregulation-207-2/documents"}}