Tex. Rev. Civ. Stat. art. 4006
The preceding Article shall not be held to prevent any steam or electric interurban railway, telegraph company, or chartered transportation company, or sleeping car company, or the receivers or lessees thereof, or persons operating same, or the officers, agents, or employees thereof, from granting or exchanging free passes or free transportation, franks, privileges, substitutes for pay, or other thing prohibited by the provisions of the preceding Article to any of the following named persons: The actual bona fide employees of any such person or corporation, company, association, or the members of their families; persons actually employed on sleeping cars and express cars; newsboys employed on trains; railway mail service employees, and their families; furloughed, pensioned, superannuated employees, and members of their families; the widows of deceased former superannuated and/or pensioned employees; persons who have been disabled or who have become infirm in the service of any such corporation, company, association, or person; the remains of any persons killed or who may have died in the employment of a common carrier; members of the family of persons killed while in the service of any such common carrier; the family or any person who was, for a period of ten (10) years or more, an employee of such common carrier and who died while in the service of the same; ex-employees traveling for the purpose of entering the service of any such common carrier; post office inspectors; the chairman of bona fide members of grievance committees of employees; bona fide custom and immigration inspectors employed by the government; State Health Officer and one assistant; Federal health officers; county health officers; members of the Industrial Accident Board or any employee thereof; State Railroad Commissioners; Secretary of the Railroad Commission; Engineer of the Railroad Commission; Inspector of the Railroad Commission; Auditor of the Railroad Commission; State Game, Fish and Oyster Commissioners and the Executive Secretary and two (2) assistants; government representatives from the Texas fish hatcheries; shipments of fish for free distribution in the waters of this State; the necessary caretakers while en route and return of any shipments of live stock, poultry, fruit, melons, or other perishable produce; trip passes to indigent poor when application therefor is made by any religious or charitable organization; Sisters of Charity, or members of any religious society of like character; any Minister of religion on intrastate trips in this State; any citizen of the State who served in the War between the States of the Union, either on the Confederate side or on the Union side of said War; veterans of the Spanish-American War, and the wife or widow of any such citizen or veteran; veterans of the Texas Ranger force who served the State prior to the year 1900, and their wives or widows; delegates to different farmers' institutes, farmers' congresses, and farmers' union; delegates to State and district firemen's conventions from volunteer fire companies; managers of Young Men's Christian Associations, or other eleemosynary institutions while engaged in charitable work; the officers or employees of industrial fairs; provided that no more than four (4) officers or employees of any one fair or fair association shall receive free passage in any one year; persons injured in wrecks upon the road of any such company immediately after such injury, and the physicians and nurses attending such persons at the time thereof; persons and property carried in cases of general epidemic, pestilence, or other calamitous visitation at the time thereof or immediately thereafter; United States Marshals and no more than two (2) of the deputies of each such Marshal; State Rangers; the Adjutant General and Assistant Adjutant General of this State; members of the State Militia in uniform and when called into the service of the State; Sheriffs and no more than two (2) of their deputies; Constables and no more than two (2) of their deputies; Chiefs of Police or city marshals, whether elected or appointed; members of the Livestock Sanitary Commission of Texas and their inspectors not to exceed twenty-five (25) in number for any one year; and any other bona fide peace officer when his duty is to execute criminal process; bona fide policemen or firemen in the service of any city or town in Texas when such policemen or firemen are in the discharge of their public duty; but this provision shall not be construed so as to apply to persons holding commissions as special policemen or firemen.
Tex. Rev. Civ. Stat. Ann. art. 4006