TexasCHLforum.com

IANAL. But it has always been my understanding that what the DL allows you to do is operate a vehicle on the public roadways. Living in the country we often drove grain and fertilizer trucks (As well a various types of farm equipment) around the farm well before we got a DL. As long as we stayed on private property and off the roads, it is my understanding that we were breaking no law.
If that understanding is correct then the agreement, a DL represents, between you and the State is about the use of public facilities, built, owned, and maintained by the State. That would be a privilege, not a right.