I have been pondering this question for some time. Where in the Canon code does it specify the denial of communion because of being in an invalid marriage? …
Canon 915 of the Code of Canon Law indicates the principal cases in which Communion may be publicly refused. The canon says, …
This seems general in nature and does not specifically state the situation of a remarried couple. I’m sure there is one that is more specific, … And let’s face it, there are a multitude of grave sins, which would opt a lot of people out. Maybe Dan can help me on this one.
That canon is as specific as you can find in the Code of Canon Law. The are a few principles here.
First, whenever we say people who are “divorced and remarried” are not allowed to receive Holy Communion, we’re talking about Catholics (only Catholics can receive Communion in the first place).
Second, in order for Catholics to be in a marriage that is presumed to be valid, they have to marry in accord with canonical form (before a priest and two witnesses or else with a dispensation from this requirement).
Third, if a Catholic marries, divorces, and attempts to remarry, that “remarriage” will be “outside the Church” and not in accord with canonical form. It is not presumed to be a valid marriage. The persons involved are in apparent violation of the 6th Commandment (i.e., objectively a grave sin).
Fourth, nevertheless, that act of “remarriage” is, in itself, a public, legal act (i.e., their state of life is “manifest”).
Fifth, “obstinate persistence” is a quality a parish priest would look into. There are some Catholics who don’t even know about any of what I said above. So, if the priest discovers a parishioner in this situation, he would inform the person. There are ways to remedy the situation.
Here’s a more official discussion of the topic:
vatican.va/roman_curia/pontifical_councils/intrptxt/documents/rc_pc_intrptxt_doc_20000706_declaration_en.html
As for all the other sins out there–yes, that’s true. The issue of “manifest” sin is a bit hard to quantify, sometimes, but I’m fully in support of this canon (915) being consistently and appropriately applied across the board and not just in regard to the “divorced and remarried.”
Dan