Section 545.404 of the Texas Transportation Code which is titled Unattended Motor Vehicle. Here it states that an operator may not leave the vehicle unattended without:
 (1) stopping the engine;
 (2) locking the ignition;
 (3) removing the key from the ignition;
 (4) setting the parking brake effectively; and
 (5) if standing on a grade, turning the front wheels to the curb or side of the highway.
While  Texas Transportation Code Section 545.404, prohibits the operator of a  motor vehicle from leaving the vehicle unattended without stopping the  engine, locking the ignition, and removing the key from the ignition at  least one Texas court has held that this section of law only applies to  vehicles parked on public highways and streets. The Cities of Dallas,  Austin and Arlington have also interpreted Texas Transportation Code  Section 545.404 in a similar manner.
 
 To close what may be seen  as a loophole many cities have amended their city code with an ordinance  making it unlawful to park and leave unattended, upon any private  street, or upon any off-street public or private property used for  parking and accessible to the public, a motor vehicle with the engine  running or that has a key in the ignition.
My questions are as follows:
In there a definition of "unattended" as in how far away, etc.?
Where could I find the court case cited above regarding the ruling it only applies to public highways and streets?
Where could I find information if the city in which the ticket is issued closed the "loophole" as mentioned?
Thanks