I answered an email from someone who has read the things I have written about priesthood, including the Elijah materials. He was asking about priesthood held by LDS men who were not in a position of leadership, and inquiring whether LDS missionaries could still offer acceptable baptism. Those who have read what I have written will understand the question and my response.
I responded as follows:
In the beginning there was only one, unified priesthood. This is why Joseph commented “all priesthood is Melchizedek, but there are different degrees of it.” (I’m paraphrasing his statement.)
If, therefore, any person has been ordained to any portion of priesthood, they have received in part the original, unified priesthood.
In the end of the world the same priesthood which was in the beginning is to return. Adam prophesied this and Enoch recorded Adam’s prophecy. (Moses 6:7.) It returns when God’s voice confers it upon a man. (JST Gen. 14:29.) Therefore if a man holds some degree of it, and God confers the rest by His voice from heaven, the ordination is completed and the same priesthood which was in the beginning of the world returns.
The LDS Church is not led by men authorized to offer baptism, but it includes many men who could offer baptism. But the form of baptism is strictly prescribed by the Lord in 3 Ne. 11. He explains His doctrine and then directs that anything more or less than this cometh of evil.
The missionaries are required to compel a confession from prospective converts before baptism that they acknowledge Thomas S. Monson as a prophet. This is in Preach My Gospel. It is the second question asked in the baptismal interview. As long as a missionary conforms to the Lord’s direction in 3 Ne. 11, I see no reason why their baptism would not be acceptable to the Lord. But if they follow the direction in Preach My Gospel, then the baptism would need to be redone. Not because of a lack of authority, but because the ordinance has been corrupted.