Yes. Course is considered high key as well.
You can be called up for a maximum of 40 days in one work year. So
in theory, they can call you up for a 30 day course, and call you
up for 10 day ICT in one work year.
However, I've never seen them do this unless you volunteer. If you
go for course, usually they won't call you for ICT.
As the other poster said, high key is computed by number of days.
As long as you serve more than 7 days in one work year, that's a
high key.