(a) The court may not refuse to order withholding solely on the basis that the obligor paid the arrearages after the obligor received the notice of application for a writ of withholding.
(b) The court shall order that a reasonable amount of income be withheld and applied toward the liquidation of arrearages, even though a judgment confirming arrearages was rendered against the obligor.
Official text of the Texas Family Code as published by the Texas Legislative Council.