Texas Government Code - GOV'T § 26.052. Probate and Mental Health Code Cases

(a) In a county in which the county court and any county court created by statute have jurisdiction in both probate matters and proceedings under Subtitle C, Title 7, Health and Safety Code,  1 during each year for which a statement has been filed as provided by Subsection (b), those cases and proceedings must be filed in a county court created by statute with jurisdiction of those cases and proceedings.

(b) A county judge may file, not later than January 15 of each year, a statement with the county clerk electing not to hear probate matters and proceedings under Subtitle C, Title 7, Health and Safety Code.