(a) If a plaintiff, cross-complainant, or petitioner files an amended complaint or other amended initial pleading that changes the jurisdictional classification from limited to unlimited, the party at the time of filing the pleading shall pay the reclassification fee provided in Section 403.060, and the clerk shall promptly reclassify the case. If the amendment changes the jurisdictional classification from unlimited to limited, no reclassification fee is required, and the clerk shall promptly reclassify the case.
(b) For purposes of this chapter, an amendment to an initial pleading shall be treated in the same manner as an amended initial pleading.