City of Arlington, Texas v. Jim Cannon

Summary

The Texas Supreme Court held that the Board of Equalization lacked jurisdiction to raise property valuations without required notice, that voluntary appearance waived that notice, and that a class‑wide injunction cannot be granted where each taxpayer must prove excessiveness or substantial injury. Accordingly, the court reversed the injunctions for the class plaintiffs, affirmed the injunction for A.B. Jordan and for taxpayers who voluntarily appeared, and affirmed judgments denying relief to others.