If they be literal descendants of Aaron they have a legal right to the bishopric, if they are the firstborn among the sons of Aaron.
Doctrine & Covenants 68:16
We saw the Lord standing upon the breastwork of the pulpit, before us; and under his feet was a paved work of pure gold, in color like amber. 110:2
Moses appeared before us, and committed unto us the keys of the gathering of Israel from the four parts of the earth, and the leading of the ten tribes from the land of the north. 110:11
Elias appeared, ... saying that in us and our seed all generations after us should be blessed. 110:12
Another great and glorious vision burst upon us; for Elijah ... and said: Behold, the time has fully come, which was spoken of by the mouth of Malachi—testifying that he [Elijah] should be sent, before the great and dreadful day of the Lord. 110:13
The great and dreadful day of the Lord is near. 110:16
Form acquaintance with men in this city ... as it shall be given you. 111:3
In due time that I will give this city into your hands, that you shall have power over it, insomuch that they shall not discover your secret parts; and its wealth pertaining to gold and silver shall be yours. 111:4
Concern not yourselves about your debts, for I will give you power to pay them. 111:5
You ... shall be signalized unto you by the peace and power of my Spirit, that shall flow unto you. 111:8
There are more treasures than one for you in this city. 111:10
Be ye as wise as serpents and yet without sin; and I will order all things for your good, as fast as ye are able to receive them. 111:11