Texas Family Code - FAM § 156.409. Change in Physical Possession

(a) The court shall, on the motion of a party or a person having physical possession of the child, modify an order providing for the support of the child to provide that the person having physical possession of the child for at least six months shall have the right to receive and give receipt for payments of support for the child and to hold or disburse money for the benefit of the child if the sole managing conservator of the child or the joint managing conservator who has the exclusive right to determine the primary residence of the child has:

(a-1) If the court modifies a support order under this section, the court shall order the obligor to pay the person or entity having physical possession of the child any unpaid child support that is not subject to offset or reimbursement under Section 157.008 and that accrues after the date the sole or joint managing conservator:

(a-2) This section does not affect the ability of the court to render a temporary order for the payment of child support that is in the best interest of the child.

(a-3) An order under this section that modifies a support order because of the incarceration of the sole or joint managing conservator of a child must provide that on the conservator's release from incarceration the conservator may file an affidavit with the court stating that the conservator has been released from incarceration, that there has not been a modification of the conservatorship of the child during the incarceration, and that the conservator has resumed physical possession of the child.  A copy of the affidavit shall be delivered to the obligor and any other party, including the Title IV-D agency if appropriate.  On receipt of the affidavit, the court on its own motion shall order the obligor to make support payments to the conservator.

(b) If a respondent has been ordered under Chapter 105 to provide the court and the state case registry with the respondent's current mailing address or e-mail address, notice of a motion for modification or hearing on a motion for modification under this section may be served:

(c) A notice or document associated with a motion for modification under this section not otherwise described by Subsection (b) may be delivered in the manner described by Subdivision (2) of that subsection.