What the standard says
The International Business Aviation Council (IBAC) launched the International Standard for Business Aircraft Handling (IS-BAH) in 2014 for "business and general aviation Ground Handling Service Providers." 13 It is built on "a progressive Safety Management System (SMS) appropriate to the scale and nature" of the handler. IBAC describes it as a voluntary standard that "will enable handlers to meet ICAO SMS requirements." 3
Stage 1 "confirms that the SMS infrastructure is established and that safety management activities are appropriately targeted." Stage 2 "ensures that safety risks are being effectively managed." Stage 3 "verifies that safety management activities are fully integrated into the operator's business and that a positive safety culture is being sustained." 1 Our reading: Stage 1 checks that the system exists and is aimed at the right hazards; Stage 2 checks that it is working on them.
The path to registration is six steps, the last "an external IS-BAH audit" by "an accredited IS-BAH auditor from the IBAC website." 4 IBAC's auditor page says an independent third-party audit is required "to achieve the registration, or when renewing (every two, or three years) or progressing to the next stage." 2
What it does not mean
A stage describes safety-management maturity, not service. IBAC's three definitions speak of SMS infrastructure, risk management and safety culture; none mentions turnaround time, fuel price or facilities. 1 Stage 1 is a full registration, not a partial one; IBAC counted its 300th registered location at Stage 1. 5
A stage is also not the same as "conformance." Since July 2026 IBAC has offered a self-declaration option, under which a handler "states its conformity" with the standard "without the need for an external audit or certification." 6 IBAC's comparison of the two paths marks the stage-level seal, the registration plaque and the map listing as not applicable to self-declaration. 7 An FBO that states a stage has been audited; one that says only that it conforms to IS-BAH may have declared that itself. NATA Safety 1st is NATA's training, certification and education program, not an audit standard. 8
How to check it yourself
- IBAC's list of registered providers at locations.ibac.org is searchable by ICAO code, IATA code, country and city; IBAC's IS-BAH resources page links it as a PDF. List, map and PDF confirm that a location is registered; none shows the stage. 9
- Ask the FBO for its IS-BAH certificate and the stage. IBAC issues a registered seal that carries the stage level, with separate seals for Stage 2 and Stage 3. 74
- Ask for the date of the last audit. Renewal audits fall "every two, or three years," so a stage stated without a date may have lapsed. 2
Why it matters for AI answers
The stage and the audit date belong on the FBO's location fact page, in HTML text, alongside hours, fuel, hangar and customs, because "which FBO" prompts are answered from those facts. Write it in IBAC's terms ("IS-BAH Stage 2 registered, audited [month year]") so an engine can match the page to the standard's wording. It is the pattern set out for FBOs in AEO for FBOs and MROs; see IS-BAH in the glossary and the prompt in the library.