A co-owner of residential property may act in the name of and on behalf of another co-owner, whether known or unknown, as the co-owner's statutory agent and attorney-in-fact for the purposes described by Section 65.004 if:
(1) the co-owner has occupied the property for more than five years;
(2) the co-owner has a residence homestead exemption for the property under Section 11.13, Tax Code;
(3) for the five years preceding the date the documents required by Section 65.003 are filed, the occupying co-owner has paid all assessed ad valorem taxes without delinquency and without contribution from the other co-owner; and
(4) the occupying co-owner files the documents required by Section 65.003.
Official text of the Texas Property Code as published by the Texas Legislative Council.