The Legislature shall provide by law for the trial and removal from office of all officers of this State, the modes for which have not been provided in this Constitution.
Tex. Const. art. 15, § 7, under Impeachment.
Tex. Const. art. 15, § 7
REMOVAL OF OFFICERS WHEN MODE NOT PROVIDED IN CONSTITUTION
The Legislature shall provide by law for the trial and removal from office of all officers of this State, the modes for which have not been provided in this Constitution.