13 Tex. Admin. Code § 21.15
No individual may be mentioned in a marker text until 20 years after his or her death, except in the case of a deceased person of state or national significance, in which case the State Marker Review Board of the commission will be the final authority on eligibility. Individuals must be eligible for marking on their own merits, rather than from their association with, or relation to, a historical person. Eligibility for an official Texas historical grave marker will also be determined by this section.
Source Note:The provisions of this §21.15 adopted to be effective July 9, 1996, 21 TexReg 5974.