Nevelah

Nevelah (נבלה) is the Believing Noahide's inheritance which is allowed to be sold to a Nachri if the Believing Noahide refuses it as per Devarim 14:21. If a Jew eats Nevelah then the Jew must wash their clothes and body in exactly the same way that a Believing Noahide must wash to be Tahor or else they will both be Tamei as per Leviticus 17:15. It means there are times when a Jew may eat Nevelah. What are the times when a Jew may eat Nevelah? When the Jew sits to eat with a Believing Noahide it should be assumed that the meal includes Nevelah. Just as the Believing Noahide must wash before worship, so too the Jew who sits with a Believing Noahide to eat should also wash before worship likewise. Before giving the Northern velah to a Believing Noahide a Jew may trim the fat off first to use in any other way than eating it but any Jew who does not give the Believing Noahide their Nevelah to eat (or sell it to a Nachri if the Believing Noahide does not want it) and makes himself Tumah with it has broken the Law per Leviticus 22:8. This is similar to the law on Treifah.