Except as expressly provided by this subchapter, this subchapter does not affect the rights of a surviving spouse or person claiming from the surviving spouse in disputes with persons claiming from a deceased spouse or the successors of any of them concerning a beneficial interest in property or the proceeds from a beneficial interest in property, subject to a right of survivorship under an agreement that satisfies the requirements of this chapter.
Official text of the Texas Estates Code as published by the Texas Legislative Council.