In a media release today the WA government have annouced that "from Friday, 12 February, any businesses already using their own QR code for registration will be required to also clearly display the WA Government’s SafeWA QR code. This will ensure that patrons are able to choose their preferred registration platform and facilitate the most effective and efficient collection of information for contact tracing purposes."
If you are using your own QR code register you can continue using this but MUST also display the SafeWA QR code. Manual registers can also still continue to be used.