PLACE FOR HOLDING TERMS OF COURTS IN NEW COUNTY BEFORE COUNTY SEAT IS DESIGNATED.
Tex. LOC. GOV'T Code § 71.002.
in effectUntil the county seat of a new county is established, the terms of the district, county, and commissioners courts of the county shall be held at the place designated by the commissioners court.
SUBCHAPTER B. ELECTION FOR DETACHMENT OR ATTACHMENT OF COUNTY TERRITORY
