@Luke Lesh you won't find anything in the ORS that states specifically "wholesaling is illegal". Reason being, "wholesaling" is not a defined real estate term. It's used all the time, but wholesaling happens in all sales industries and all states. It's a simple term, not a recognized real estate term. Hence it's not in our statutes.
Oregon has a "definition of real estate activity" and "wholesaling" as taught by gurus, does in fact fit in the "definition of real estate activity" per the State of Oregon. So if you're wholesaling, without a license, you are breaking the law. In fact, even if you do have a license, "wholesaling" as taught by a guru is probably illegal as well.
It really all comes down to marketing. You cannot market a property you do not own without a real estate license. That is clear as day and night in the Oregon statutes. This fact gets argued all the time on BP, but it isn't even debatable in my opinion. The whole "buyer's list" discussion pretty much makes it black and white to me.
Now, "Assigning" a property is legal and will be facilitated by local title companies. It's the "marketing a property you do not own" (or have a listing agreement with the owner) in order to do that "wholesale" that breaks the law.