(a) Who Must File; Contents. A nongovernmental corporate party must file 2 copies of a disclosure statement that:
(1) identifies any parent corporation and any publicly held corporation owning 10% or more of its stock; or
(2) states that there is no such corporation.
(b) Time to File; Supplemental Filing. A party must:
(1) file the disclosure statement with its first appearance, pleading, petition, motion, response, or other request addressed to the court; and
(2) promptly file a supplemental statement if any required information changes.