On 28 April 1969, Paul VI announced the foundation of the International Theological Commission, a organ intended to be parallel to the Congregation for the Doctrine of the Faith.
On that occasion, the serious French magazine Informations Catholiques Internationales (n. 336 – May 15, 1969, p. 9), reported the story and gave the list of the 30 theologians chosen for the Commission (below in French). Among them, we translate this description:
Joseph RATZINGER: German, age 45, dogmatic theology, ecumenism; previously suspect [of heresy] by the Holy Office; member of the Faith and Ecumenism Commission; outstanding work in collaboration with Karl Rahner: Primacy and Episcopate.
Other theologians also under suspicion by the Holy Office were Yves Congar, Henri de Lubac, Karl Rahner, and Hans Urs von Balthasar.