Texas Estates Code - EST § 124.007. Exclusion of Certain Property from Apportionment

(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:

(b) The exclusion provided by this section does not apply if the result would be to deprive the estate of a deduction otherwise allowable under Section 2053(d), Internal Revenue Code of 1986, for a state death tax on a transfer for a public, charitable, or religious use.