I recently found a church where they only have the pre-Vatican II altar that is against the wall with a reredos and the tabernacle is in the center where they reserve the Blessed Sacrament. I was wondering if this was allowed to be done without any special permission from the Bishop (both the use of only the old altar and the tabernacle’s position). I have looked at many other threads but I got a lot of different information that said things like the tabernacle isn’t on the altar but actually in the reredos so it is technically allowed.
The church has both the Ordinary and Extraordinary Form of the Mass and all are said ad orientem. If it is of any help, the church is St. John Cantius in Chicago.