Texas Election Code - ELEC § 252.010. Transfer of Appointment

(a) If a candidate who has filed a campaign treasurer appointment decides to seek a different office that would require the appointment to be filed with another authority, a copy of the appointment certified by the authority with whom it was originally filed must be filed with the other authority in addition to the new campaign treasurer appointment.

(b) The original appointment terminates on the filing of the copy with the appropriate authority or on the 10th day after the date the decision to seek a different office is made, whichever is earlier.