 On December 6, 1971, Kocisko, along with Bishops Dudick and Mihalik, published a pastoral letter observing the 325th anniversary of the Union of Uzhhorod and the 200th anniversary of the canonical erection of the Eparchy of Mukacheo as a self-governing entity.In the letter, Metropolitan Kocisko and the other bishops called to task the Synod of Bishops of the Russian Orthodox Church held in Zagorsk, USSR from May 30 through June 2 of that same year.On June 1, the Russian bishops officially declared the Union of Uzhorod (1646) to be annulled, justifying the liquidation of the Greek Catholic Church in Ukraine and other countries of the Soviet block.