If the GNSS Secure Transceiver does not receive data from the GNSS receiver for more than 3 continuous hours, the GNSS Secure Transceiver shall generate a response message to the READ RECORD command with RECORD number equal to ‘01’ with a Data Field of 12 bytes all set to 0xFF. Upon reception of the Response message with this value of the data field, the VU shall generate and record an event of type EventFaultType enum ‘0D’H Absence of position information from GNSS receiver event with a timestamp equal to the current value of time only if the following two conditions are satisfied: a) the Smart Tachograph is not in calibration mode and b) the vehicle is moving.