The Air Charter Safety Foundation (ACSF) and Argus have reached an agreement in principle to offer the charter and fractional ownership industry a single audit combining both the ACSF industry audit standard (IAS) and the Argus Platinum standard. Under the agreement, Argus will offer an IAS module as an add-on to its proprietary Platinum audit standard. Operators that successfully complete the audit performed against the Platinum standard, including the IAS module, will receive the Argus Platinum rating and be added to the ACSF registry.