Any woman having attained her sixteenth (16th) birthday is eligible for membership, provided she is personally acceptable to DRT and is a lineal descendant of a man or woman who rendered loyal service for Texas prior to the consummation of the Annexation Agreement of the Republic of Texas with the United States of American on the nineteenth day of February, eighteen hundred forty-six (19 February 1846).

Proof submitted by an applicant shall include documentation on the applicant's ancestor.  Any date cited on the membership application shall be documented. The applicant must furnish acceptable proof of her lineal descent from a man or woman who served in any of the following capacities:

 a.  As a colonist with Austin's Old Three Hundred, or any colonies authorized under the Spanish or Mexican governments before the Texas Revolution or those authorized by the Congress of the Republic of Texas.

b.  As an officer or private in the service of the Colonies or of the Republic of Texas.

c.  As a loyal resident, male or female, regardless of age, who established residence in Texas prior to the nineteenth day of February, eighteen hundred forty-six (19 February 1846).  "Loyal" shall be interpreted to mean that he or she had not been proved disloyal.  A loyal resident, regardless of age, gave the service of residing in Texas and aiding in its settlement.  "Service" shall be interpreted to mean "resident" or "military".

d.  As a recipient of a land grant authorized by the Provisional Government of the Republic of Texas.  Those grants include "Toby Scrips"; head rights, first, second, third and fourth class; preemption grants; land scrips; colony contracts; bounty certificates; and donation certificates.