Since Airlock Gateway 6.1 it is also possible to send control API commands from an ICAP service. To do so, the ICAP-Header "X-AL-CONTROL" is used. The control API command is sent in the value of this header and is equally encoded as the control API cookie values described further down. For ICAP services only the unconditional control API commands are allowed. Enabling the control API feature on the mapping does not have any effect on ICAP services.