The California Court of Appeal's published opinion in Thompson v. Impaxx, Inc., 113 Cal.App.4th 1425, 7 Cal.Rptr.3d 427 (2003), is important because it concludes that customer non-solicitation provisions are enforceable only to the extent necessary to protect an employer's legitimate trade secrets. The plaintiff in Thompson sued his former employer for wrongful termination after the employer terminated the plaintiff's employment for refusing to sign an agreement containing a customer non-solicitation provision. The employee in Thompson sought to build upon the decision in D'Sa v. Playhut, Inc., 85 Cal.App.4th 927, 102 Cal. Rptr.2d 495 (2000), in which a former employee refused to sign a covenant not to compete and sued his former employer for wrongful termination. The former employee prevailed because the covenant not to compete was not limited to the protection of the employer's property, trade secrets, or other proprietary information and was therefore unenforceable under section 16600 of the California Business and Professions Code.