(a) Subject to Subsection (b), the court shall order genetic testing subsequent to the testing conducted under Section 204.051 if:
(1) a party to the proceeding to declare heirship contests the results of the genetic testing ordered under Section 204.051; and
(2) the party contesting the results requests that additional testing be conducted.
(b) If the results of the genetic testing ordered under Section 204.051 identify a tested individual as an heir of the decedent, the court may order additional genetic testing in accordance with Subsection (a) only if the party contesting those results pays for the additional testing in advance.