Found it. Section 12.F.1 talks about scheduled landing limitations. Max is 8 landings per duty period, extendable to 10 landings per duty period.

This DSL is really not that bad. It's a lot of work, but we used to see schedules like these on a daily basis.

I believe that DL is parking all of CHQ's 135s. Not sure exactly how many that is though. For us, I believe we have lost 30, give or take a few, total airframes to date.