Not close enough to a reference right now but my answer is no.
There is a provision for scheduled 135 but I've always understood it to be the company that sets the schedule rather then the client.
I would venture to say you're ok but keep an eye on those duty times.
The FAA is very aware and very eager to bail you to the wall over duty times.
It's considered careless and reckless operations also, because of fatigue issues.