secure-access-port not available on SRX300

Hi.

On the SRX100 with image version 12.1x44-d45.2, I could use the following command, to make sure, that only one computer could connect to an interface, by allowing the mac address:

ethernet-switching-options {

    secure-access-port {

        interface fe-0/0/1.0 {

            mac-limit 1 action drop;

            allowed-mac xx:xx:xx:xx:xx

On the SRX300 with image version 15.1x49-d50.3, the above command is not available.  What is the command on the SRX300 that replaces the command above, so I can only allow one computer to connect to an interface?

Thanks!