<varname>ExecMainStartTimestamp</varname> timestamps record when the main child process is spawned by
the service manager. <varname>ExecMainExitTimestamp</varname> timestamps record when the main child
process exit has been detected by the service manager. <varname>ExecMainHandoverTimestamp</varname>
- timestamps record when the service executable is executed by <command>systemd-executor</command>.
- This is often the same runtime information that is stored in <varname>ExecStart=</varname>. However,
- it deviates for <varname>Type=forking</varname> services where the main process of the service is not
- forked off systemd directly. These fields either contain information of the last run of the process or
- of the current running process.</para>
+ timestamps record when the service executable is executed by <command>systemd-executor</command> for
+ services of type <literal>exec</literal>, <literal>dbus</literal>, <literal>notify</literal>, and
+ <literal>notify-reload</literal>. This is often the same runtime information that is stored in
+ <varname>ExecStart=</varname>. However, it deviates for <varname>Type=forking</varname> services where
+ the main process of the service is not forked off systemd directly. These fields either contain
+ information of the last run of the process or of the current running process.</para>
<para><varname>MainPID</varname> and <varname>ControlPID</varname> contain the main and control PID of
the service. The main PID is the current main PID of the service and is 0 when the service currently