For the purposes of this subchapter, a person resides in the county where that person:
(1) claims a residence homestead under Chapter 41, Property Code, if that person is a member of the legislature;
(2) claimed to be a resident before being subject to residency requirements under Article IV, Texas Constitution, if that person is a member of the executive branch of this state;
(3) claims a residence homestead under Chapter 41, Property Code, if that person is a justice on the supreme court or judge on the court of criminal appeals; or
(4) otherwise claims residence if no other provision of this section applies.