I would NOT worry about this law in Parker County. Chances are, the law enforcement around there is not even clear on the law if they even know it exists. The ONLY place i have ever heard of this law being enforced is in alterna country. I live in Taylor county (between Parker county and alterna country) And still road cruise on a regular basis. This time of year for road cruising in that area you will most likely see atrox and some babies of other species.
-----
Chris - TX

2.2 Splendida
1.1 Nigrita
1.1 Ruthveni
0.0.3 277 Alterna