The SAC program is spawned by init at run level two.
The SAC program reads /etc/saf/_sysconfig, the per-system configuration script.
The SAC program reads /etc/saf/_sactab, the SAC administrative file.
The SAC program forks a child process for each port monitor it starts.
Each port monitor reads /etc/saf/pmtag/_config, the per-port monitor configuration script.