The only requirement is the communicant "accepts Christ as his Lord and Savior" - to quote the weekly lead in by minister.
Grape juice rather than wine and the Deacons serve instead of a Priest, but we take Holy Communion as something any professing Christian can partake in with us. I'd say about a quarter or more of our congregation is former (or is it "lapsed" / "retired"?) Roman Catholic.
Trivia: it's the denomination Reagan belonged to. Eureka College (and Mt. Union, Hiram, and quite a few others) is associated with the denomination.
I am a member in a Disciples church as well. It’s too bad the National Assembly has been hijacked by the lefties. Thank goodness our local congregations have a great deal of autonomy.