28 Furthermore, our same predecessor by a letter of 23rd February 1596 conceded that the election of those who had been duly nominated as suffragan bishops of the Ruthenians should be confirmed by the metropolitan, as was proposed in the pact of reconciliation, and in accordance with the ancient discipline of the Eastern Church. Others of our predecessors permitted the metropolitans to establish schools in any part of Russia and freely and lawfully to commit them to any directors and teachers they pleased. They also decreed that the Ruthenians should not be at a disadvantage compared with the rest of Catholics as regards the distribution of spiritual favors; they wished them to share with the rest of the faithful in all grants of indulgences, on condition that they should also fulfill the necessary conditions. Paul V extended to all those who attended the schools established by the metropolitans the special spiritual privileges granted by the Roman pontiffs to members of the sodalities of the Blessed Virgin established in the churches of the Society of Jesus; and Urban VIII granted to all who made retreats with the Basilian monks the same indulgences as had been bestowed on the clerks regular of the Society of Jesus.
Source: Orientales Omnes Ecclesias (Vatican.va)