Secrets Of State And Other Official Information; Governmental Privileges

(a) Claim of Privilege under Law of United States. If the law of the United States creates a governmental privilege that the courts of this state must recognize under the Constitution of the United States, the privilege may be claimed as provided by the law of the United States. (b) Privileges Created by Laws of State. No other governmental privilege is recognized except as created by the laws of this State. (c) Effect of Sustaining Claim. If a claim of governmental privilege is sustained and it appears that a party is thereby deprived of material evidence, the court must make any further orders the interests of justice require, including striking the testimony of a witness, declaring a mistrial, finding upon an issue as to which the evidence is relevant, or dismissing the action.