1 Corinthians 11:27-29 ESV
Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty concerning the body and blood of the Lord. Let a person examine himself, then, and so eat of the bread and drink of the cup. For anyone who eats and drinks without discerning the body eats and drinks judgment on himself.
With respect to the catholic church's rules, I see nothing in scripture that says anything beyond the need for each of us to examine ourselves before taking communion.
Yeah, but you're going to the Bible and they have TRADITIONs and RULEs and a magisterium. You're taking The Word of God over mens rules and commandments. They'll just say your interpretation is incorrect and they see no discrepancy.
At the time St. Paul was writing, all Christians were Catholics. That's why St. Paul doesn't mention "intercommunion."