Well the QFF T&Cs say they are meant to provide a notice period for changes, in practice this can no longer be relied upon: none was given for the 2025 changes to loyalty bonus options and nor for the 2024 changes to non-flying lounge guests. Were I in the situation described by @Port Power I would be seeking to qualify ASAP.Qantas is required to give a period of notice, so if they move the goalpost you could accelerate the status runs
