(a) The vote of multiple owners of a lot may be reflected by the signature of one of the owners.
(b) After an owner signs a petition or ballot under Section 212.003 or 212.007, the owner's subsequent conveyance of the owner's interest in a lot or unplatted real property in the subdivision does not affect the validity of the signature for the purposes of that section.
Official text of the Texas Property Code as published by the Texas Legislative Council.