There is one very important issue that is being overlooked in this discussion. That is the incentive of Polk County, and Livingston in particular, to not let this new law deter Escapees from easily registering their vehicles and RV's in Texas.
That incentive is purly financial. Both Polk County and Livingston, receive both federal and state financing for essential services baced on population. Should several thousand Escapees suddenly find it unacceptable to use Livingston as their legal domicile, both Polk County and Livingston will lose siginificent amounts of revenues. I am sure that the City Fathers realize the value of receiving these revenues, without having to provide very many of those essential services.
Escapees, are a very profitable commodity to Polk County and Livingston. Maximim income, with minimum costs.
Therefore, I would expect Polk County and Livingston to see that it is in their best interests, to fight for some kind of easing of the law for traveling RV'ers.