Tex. Ins. Code § 402.051
For purposes of this chapter, an acquisition, or the aggregate of a series of related acquisitions during a 30-day period, or a disposition, or the aggregate of a series of related dispositions during a 30-day period, is material if it:
Added by Acts 2005, 79th Leg., Ch. 727 (H.B. 2017), Sec. 1, eff. April 1, 2007.