40 Tex. Admin. Code § 844.82
If a party to whom a notice of hearing provided under this chapter fails to appear for a hearing, the hearing officer may proceed in that party's absence on a default basis. If a final decision is issued, the factual allegations listed in the notice of hearing may be deemed admitted. If a party fails to appear at a hearing, the hearing officer will issue a notice of default to that party. A party may file a motion no later than 14 days after the notice of default is mailed to set aside a default announced at the hearing and to reopen the record. If a timely motion to set aside a default is filed, the hearing officer may grant the motion, set aside the default, and reopen the hearing for good cause shown, or in the interests of justice. The hearing officer may issue a decision denying the motion to set aside a default without a hearing if the motion fails to allege a reason for the party's failure to appear or if a party has failed to appear at three or more scheduled hearings.
40 Tex. Admin. Code § 844.82