Attorneys Ray Langenberg and John Hicks successfully appealed a sales tax refund case on behalf of client Zimmer US, Inc. On February 9, the Austin Court of Appeals held that Zimmer’s specialized medical instruments qualified for exemption as heath care supplies. The Court’s opinion is significant for administrative law principles in stating that courts will not follow even longstanding agency interpretations of an agency rule if the interpretations are inconsistent with the language of the rule.