Tex. Bus. & Com. Code § 9.708
A person may file an initial financing statement or a continuation statement under this subchapter if:
(2) the filing is necessary under this subchapter:
Acts 1999, 76th Leg., ch. 414, Sec. 3.07 and amended by Acts 2001, 77th Leg., ch. 705, Sec. 23, eff. June 13, 2001.