Except as provided in subsection (b) of this section, this subtitle displaces conflicting tort, restitutionary, and other law of this State providing civil remedies for misappropriation of a trade secret. This subtitle does not affect: Contractual remedies, whether or not based upon misappropriation of a trade secret; Other civil remedies that are not based upon misappropriation of a trade secret; or Criminal remedies, whether or not based upon misappropriation of a trade secret. Nothing contained in this act may be applied or construed to waive or limit any common law or statutory defense or immunity possessed by State personnel as defined under § 12-101 of the State Government Article.