(a) A court of this state in which an original suit is filed or in which a suit for child support is filed under Chapter 159 shall transfer the suit to the county of residence of the party who is a resident of this state if all other parties and children affected by the proceedings reside outside this state.
(b) If one or more of the parties affected by the suit reside outside this state and if more than one party or one or more children affected by the proceeding reside in this state in different counties, the court shall transfer the suit according to the following priorities:
(1) to the court of continuing, exclusive jurisdiction, if any;
(2) to the county of residence of the child, if applicable, provided that:
(A) there is no court of continuing, exclusive jurisdiction; or
(B) the court of continuing, exclusive jurisdiction finds that neither a party nor a child affected by the proceeding resides in the county of the court of continuing jurisdiction; or
(3) if Subdivisions (1) and (2) are inapplicable, to the county most appropriate to serve the convenience of the resident parties, the witnesses, and the interest of justice.
(c) If a transfer of an original suit or suit for child support under Chapter 159 is sought under this section, Chapter 155 applies to the procedures for transfer of the suit.