Good article...with a link to an even better one:
The takeaway gem:
“Parishioners in some civil marriages may have their marriages blessed in the Church and return to the Eucharist. Without that blessing, however, their marriages are not oriented to the Kingdom through crowning, the common cup, or other dimensions of the service that make marriage an entrance to the messianic banquet. The spouses exclusion from the chalice reflects that their unions remain as water not turned into wine, for their one flesh union has not been brought into communion with Christ.”