(a) Except as provided in subsection (b) of this section, this chapter supersedes conflicting tort, restitution and other law of the District of Columbia providing civil remedies for misappropriation of a trade secret. (b) This chapter does not affect: (1) Contractual remedies, whether or not based upon misappropriation of a trade secret; (2) Other civil remedies that are not based upon misappropriation of a trade secret; or (3) Criminal remedies, whether or not based upon misappropriation of a trade secret.