{"id":"F2005B00575","name":"CASA 184/00 - Direction under subregulation 207 (3)","slug":"casa-184-00-direction-under-subregulation-207-3","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":32018,"registerId":"commonwealth-F2005B00575-current","compilationNumber":null,"startDate":"2026-04-01","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA 184/00 - Direction under subregulation 207 (3)","content":"---\nmeta-content-style-type: text/css\nmeta-content-type: application/xhtml+xml; charset=utf-8\nmeta-generator: Aspose.Words for .NET 20.2\ntitle: \"INSTRUMENT NUMBER: CASA XX/99\"\n---\n\n?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n\n \n\n \n\n \n\n \n\nINSTRUMENT NUMBER:  CASA 184/00\n\n \n\n \n\nCIVIL AVIATION ACT 1988\n\n \n\nCIVIL AVIATION REGULATIONS 1988\n\n \n\nDIRECTION UNDER SUBREGULATION 207 (3)\n\n \n\n \n\nI, RICHARD GODFREY YATES, a delegate of CASA, under subregulation 207 (3) of the Civil Aviation Regulations 1988, direct that a flight crew member who is on flight deck duty in an unpressurised aircraft engaged in parachuting operations must be provided with, and continuously use, supplemental oxygen:\n\n (a) if the aircraft operates above flight level 120;  or\n\n (b) if the aircraft operates above 10,000 feet above mean sea level:\n\n (i) for more than 15 minutes during a sortie;  or\n\n (ii) at night;  or\n\n (iii) in I.M.C.\n\n \n\n \n\n \n\n[Signed R.G. Yates]\n\n \n\n \n\nRichard G. Yates\n\nAssistant Director\n\nAviation Safety Standards\n\n \n\n23 May 2000\n","sortOrder":0}],"analysis":{"kimi_summary":{"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"This instrument remains tightly scoped to its original purpose: setting oxygen requirements for flight crew in unpressurised aircraft during parachuting operations. It has not expanded beyond this specific safety regulation."},"complexity_factors":["Very short instrument (under 200 words)","Only 3 defined conditions (flight level 120, 10,000 feet, I.M.C.) with no formal definitions section","Simple conditional structure: one main rule with two alternative triggers (paragraphs a and b), and three sub-conditions under paragraph b","No cross-references to other legislation beyond the enabling power (subregulation 207(3))","Single operational requirement (provide and use supplemental oxygen) with clear altitude thresholds"],"plain_english_summary":"This is a safety direction issued by the Civil Aviation Safety Authority (CASA) that sets mandatory oxygen rules for pilots and flight crew flying unpressurised aircraft during parachuting operations.\n\n**What it requires:**\n- Flight crew must be given **supplemental oxygen** (extra oxygen beyond normal breathing) and must **continuously use it** during certain flights\n\n**When the rule applies:**\n- **Above 12,000 feet** (flight level 120): always required\n- **Above 10,000 feet**: required if any of these apply:\n  - The flight lasts **more than 15 minutes** at that altitude\n  - It's **night time**\n  - It's **I.M.C.** (Instrument Meteorological Conditions — basically flying in cloud or poor weather where you can't see the horizon)\n\n**Who it affects:**\n- Pilots and flight crew on **unpressurised aircraft** (planes without sealed, pressurised cabins) doing **parachuting operations** (skydiving flights)\n\n**Why it matters:**\nAt high altitudes, there's less oxygen in the air. Without supplemental oxygen, pilots can suffer from **hypoxia** (oxygen starvation), which causes impaired judgment, drowsiness, and eventually unconsciousness — extremely dangerous when flying. This rule prevents accidents by ensuring crew stay alert and capable of safely operating the aircraft."},"flash_summary":{"complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument itself sets out a specific, limited requirement for supplemental oxygen use in parachuting operations under stated altitude and condition triggers. The text contains no statement that it modifies or broadens an earlier instrument or that its scope has been altered from an original version. Therefore there is no evidence in this document that the scope has changed from the instrument's original intent."},"complexity_factors":["Clear, limited set of conditions (altitude and situational triggers) reducing interpretive complexity.","Use of aviation-specific terms (\"flight level 120\", \"I.M.C.\", \"sortie\", \"flight-deck duty\") that require operational interpretation by operators.","Behavioral requirement to \"continuously use\" oxygen creates monitoring/enforcement tasks.","Legal form: a direction made under subregulation 207(3) concentrates decision-making in the regulator, which may require operators to track administrative instruments as well as Regulations.","Time-based threshold (\"more than 15 minutes during a sortie\") requires in-flight or post-flight measurement/recording to determine compliance."],"plain_english_summary":"This direction requires flight-deck crew on unpressurised aircraft conducting parachuting operations to be provided with — and to continuously use — supplemental oxygen when flight conditions meet specified altitude/time/visibility triggers (e.g. above FL120, or above 10,000 ft when exposure exceeds 15 minutes, at night, or in IMC). It affects those crew and their operators, who must buy, fit, maintain and enforce oxygen use, creating safety benefits but added equipment, training and operational costs."}},"importantCases":[],"_links":{"self":"/api/acts/casa-184-00-direction-under-subregulation-207-3","history":"/api/acts/casa-184-00-direction-under-subregulation-207-3/history","analysis":"/api/acts/casa-184-00-direction-under-subregulation-207-3/analysis","conflicts":"/api/acts/casa-184-00-direction-under-subregulation-207-3/conflicts","importantCases":"/api/acts/casa-184-00-direction-under-subregulation-207-3/important-cases","documents":"/api/acts/casa-184-00-direction-under-subregulation-207-3/documents"}}