ANNEX I CRequirements for construction, testing, installation, and inspection
Appendix 2
TACHOGRAPH CARDS SPECIFICATION
3.HARDWARE AND COMMUNICATION
3.5.Command descriptions
TCS_32If both length bytes are requested, and Le=0 (secure messaging):
When using protocol T=1, the card shall answer to Le=0 by sending all available output data.
When using protocol T=0, the IFD shall send the first command with P3=Lc + data, the card shall answer (to this implicit Le=0) by the Status bytes ‘61La’, where La is the number of response bytes available. The IFD shall then generate a GET RESPONSE command with P3 = La to read the data.