{"id":"F2016L00286","name":"CASA EX39/16 - Exemption - aircraft operating without carriage of Mode S transponder equipment (Balloon Flights Over Melbourne)","slug":"casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":94235,"registerId":"commonwealth-F2016L00286-current","compilationNumber":null,"startDate":"2026-04-02","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"CASA EX39/16 - Exemption - aircraft operating without carriage of Mode S transponder equipment (Balloon Flights Over Melbourne)","content":"Instrument number CASA EX39/16\n\nI, Mark alan skidmore, Director of Aviation Safety, on behalf of CASA, make this instrument under regulation 11.160 of the Civil Aviation Safety Regulations 1998.\n\n\\[Signed Mark Skidmore AM\\]\n\nMark Skidmore AM  \nDirector of Aviation Safety\n\n7 March 2016\n\nExemption — aircraft operating without carriage of Mode S transponder equipment (Balloon Flights Over Melbourne)\n\n1 Duration\n\nThis instrument:\n\n(a) commences on the day of registration; and\n\n(b) expires at the end of December 2018, as if it had been repealed by another instrument.\n\n2 Repeal\n\nInstrument CASA EX15/16 is repealed.\n\n3 Application\n\nThis instrument applies to balloons operated by Balloon Flights Over Melbourne Pty Ltd, Aviation Reference Number 598425 (the operator).\n\n4 Exemption\n\nThe balloons mentioned in section 3 are exempt from compliance with paragraph 9E.2 of Civil Aviation Order 20.18 in relation to the requirement to carry a serviceable ADS-B capable Mode S transponder.\n\n5 Conditions\n\nThe exemption is subject to the conditions mentioned in Schedule 1.\n\nSchedule 1 General conditions\n\n1 The operator must ensure that each balloon taking advantage of this exemption carries a serviceable Mode A/C transponder.\n\n2 The operator must ensure that I.F.R. flight plans for the aircraft in Australian airspace are annotated in Item 18 with “RMK/CASA MODE S EXEMPT” (quotation marks omitted).\n\n> Note If this annotation is not included in a flight plan, the Airservices Australia automated systems will reject the plan.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2514},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The instrument maintains its original narrow scope, providing a specific equipment exemption for one balloon operator from ADS-B Mode S transponder requirements, subject to alternative transponder carriage and flight plan annotation conditions."},"complexity_factors":["Single operator scope limits applicability to one specific company","Only one cross-reference to Civil Aviation Order 20.18, paragraph 9E.2","Minimal conditional logic (exemption + 2 simple conditions in Schedule 1)","No defined terms section or nested exceptions","Automatic expiry mechanism specified in primary clauses"],"plain_english_summary":"This instrument exempted Balloon Flights Over Melbourne Pty Ltd (ARN 598425) from the usual Civil Aviation Order 20.18 requirement to carry Mode S transponders, allowing time‑limited use of serviceable Mode A/C units instead. For IFR flights the flight plan had to include the remark RMK/CASA MODE S EXEMPT to avoid automated rejection.\n\nIt reduced cost and weight burdens for the company’s hot air balloons; it commenced March 2016 and expired end‑December 2018."}},"importantCases":[],"_links":{"self":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f","history":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f/history","analysis":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f/analysis","conflicts":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f/conflicts","importantCases":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f/important-cases","documents":"/api/acts/casa-ex39-16-exemption-aircraft-operating-without-carriage-of-mode-s-transponder-equipment-balloon-f/documents"}}