((a)) ** Payment and acceptance** The payment and acceptance of any claim, after its determination in accordance with this chapter, shall be a full discharge to the United States or any State or political subdivision thereof of all claims and demands touching any of the matters involved in the controversy.

((b)) ** Claims filed prior to ** The provisions of this chapter shall not affect claims arising from any unauthorized disbursement which were filed in any court of competent jurisdiction prior to .October 19, 19841984-10-19