Get the Disability List. 

This is a listing of all of the public domain Disability items. 

Each Disability item is represented by a TDisa. The collection of Disability items is represented by a List of TDisa. 

Since this data is public, no authentication is required. The returned Auth is used only for status and messages.

[WebMethod(Description = "Gets a list of all disabilities")]
public TAuthDisaList GetDisabilityList();