So President Truman dissolved the OSS on September 20,1945 and created the Central Intelligence Group (CIG) but it was not permitted to perform cover operations, it was still Wisner and Dulles who had exclusive rights to cover operations.
So President Truman "dissolved" the OSS on September 20,1945 and created the Central Intelligence Group (CIG) without permission to perform cover operations, then reinstated seven year latter, 1952, under President Eisenhower. It was still Wisner and Dulles who had exclusive rights to cover operations.