Tex. Est. Code § 124.007
(a) To the extent that property passing to or in trust for a surviving spouse or a charitable, public, or similar gift or devise is not an allowable deduction for purposes of the estate tax solely because of an inheritance tax or other death tax imposed on and deductible from the property:
Added by Acts 2009, 81st Leg., R.S., Ch. 680, Sec. 1, eff. January 1, 2014.