Do modern descendants of the Levites need to be ordained with the Aaronic Priesthhood?

Literal descendants of Aaron have a legal right to Aaronic priesthood: > "No man has a legal right to this office, to hold the keys of this > priesthood, except he be a literal descendant of Aaron." (D&C 107:16) If a literal descendant of Aaron were to be baptized into the Church of Jesus Christ of Latter-Day Saints–supposing they could trace their lineage–would they need to be ordained with the Aaronic Priesthood, or would the church recognize their legal right to it?