If an officer-elect declines to qualify for the office before assuming office for the term for which elected, a vacancy in the term occurs on the date the declination is delivered to the appropriate authority.
Tex. Elec. Code § 201.029
DECLINATION OF OFFICER-ELECT
Acts 1985, 69th Leg., ch. 211, Sec. 1, eff
Official source: Texas Constitution and Statutes. Reproduced from public-domain Texas statutes; confirm against the official source for the current text. Not legal advice.