1 Tex. Admin. Code § 81.61
For any voting machine, voting device, voting tabulation device and any software used for each, including the programs and procedures for vote tabulation and testing, or any modification to any of the above, to be certified for use in Texas elections, the system shall have been certified, if applicable, by means of qualification testing by a Nationally Recognized Test Laboratory (NRTL) and shall meet or exceed the minimum requirements set forth in the Performance and Test Standards for Punch Card, Mark Sense, and Direct Recording Electronic Voting Systems, or in any successor voluntary standard document developed and promulgated by the Federal Election Commission. This section applies only to systems and modifications to previously certified systems submitted after the effective date of this rule.
1 Tex. Admin. Code § 81.61