Texas Election Code - ELEC § 241.0061. Security for Costs

(a) Not later than the third day after the date the contestee's answer is received by the presiding officer of the house having jurisdiction, the contestant must file with the secretary of the senate or chief clerk of the house of representatives, as appropriate:

(b) Security for costs must be filed under Subsection (a), and an affidavit of inability to pay costs may be contested, in the manner generally applicable to a civil suit in the district court, subject to any changes imposed by the master or by rules of the house having jurisdiction.