Prop 1 Broadens scope of homestead ad valorem tax exemption for disabled veteran or spouse - The constitutional amendment authorizing the legislature to provide for an exemption from ad valorem taxation of part of the market value of the residence homestead of a partially disabled veteran or the surviving spouse of a partially disabled veteran if the residence homestead was donated to the disabled veteran by a charitable organization for less than the market value of the residence homestead and harmonizing certain related provisions of the Texas Constitution.