Since you asked:
Accessible parking spaces are 5'-0" wider (minimum) than standard parking spaces, and NO, it is not to be used by anyone who does not have either a Blue or Red Placard or Disabled Person License plate (or exceptions noted below).
Texas has reciprocity with foreign or out-of state parking placards or license plates. Texans can also [use] their placards or license plates to park in all other states as well.
With the exception of:
Owners of Vehicles displaying:
* Disabled Veteran
* Congressional Medal of Honor
* Former Prisoner of War
* Pearl Harbor Survivor
* Purple Heart Recipient
* Legion of Valor (Air Force Cross, Distinguished Service Cross, Army Distinguished Service Cross, Navy Cross or Medal of Honor) or
* Legion of Merit License Plates
Texas law allows parking placards to be removed and displayed in any vehicle used for transportation of a person with disability. People with disabilities can apply for placards even if they do not own a car.
It is a Violation of Texas Law:
** To park a vehicle in an accessible parking space without displaying the appropriate plate or placard, even if a driver or a passenger of the vehicle has a disability;
** To park a vehicle in and accessible space when neither the driver or any passenger has a disability, even if the vehicle displays the appropriate plate or placard;
** To park a vehicle with a placard or plate that is expired;
** To park a vehicle with a placard or plate that belongs to someone who is not a driver or a passenger in the vehicle;
** To lend a parking placard to an individual without a disability who uses that placard to violate state law;
** To steal or counterfeit a parking placard or license plate;
** To park a car in such a way that it blocks access to an accessible parking space, and access aisle, or any architectural improvement that provides access for people with disabilities, such as a ramp or a curb cut.
Violations of Accessible Parking in Texas:
People who park in accessible parking spaces or who misuse Disabled Parking Placards or License Plates are subject to fines of up to
$2,500 and or/up to 50 hours of community service.
Accordingly, parking a vehicle so as to block any disabled parking van-access aisle is an offense.
A minimum number of accessible parking spaces must be provided, consistent with a chart.
Most of the above is right out of:
http://gov.texas.gov/files/disabilities/accessible_parking_fast_facts.pdf