(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 Filing; 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.