Description: The version number of the XAIT that was last read successfully from the network, but not necessarily accepted by the monitor app. (LastReadStatus of okay or okayButRejected.) The version within the XAIT is a 5-bit unsigned integer (range 0..31), but if no XAIT has been read from the network, the value reported must be -1. (NOTE: Technically, each section has its own version number; however, they are required to all be the same, so this may be extracted from the first section.) If this is -1 and VersionInUse is not -1, it can be inferred that the version in use was loaded from persistent storage; however, if both versions are the same, it cannot be inferred that the initially used XAIT did not come from persistent storage.