
Closer Study
According to D&C 20:50 when an Elder is present the Priests are not to bless the sacrament? It lists 'only' specific things they are to do. Of course in the Church the sacrament is usually blessed by a Priest. So how would you explain this then?
Church policy tries to include the lesser priesthood more, which is the reason why we let deacons and teachers help in preparing/passing out the sacrament, although this is also not according to D&C 20 because "administering" has always been understood to include preparing and passing it out until a policy change during the presidency of Heber J. Grant. Originally members also didn't pass the sacrament through the rows as I see them doing it here in Provo all the time, as that was considered a priesthood work. That was how the priests were able to "assist the elders in administering the sacrament" as they were not supposed to bless it with Elders present because the ones blessing the sacrament were considered to be the ones presiding over it. There have been many changes in the way the sacrament is administered (who is blessing, who is presiding, who handles the sacrament, the covenant sign giving during the blessing etc.).
Some of the rules have never been explained with a specific scripture so a change can't be understood from the D&C, and some that were given in the D&C have changed as well like the one you mentioned JB.
When you read the surrounding verses it is just saying that when there is an Elder present, the priest is not in charge. The sacrament then becomes the responsibility of the Elder. Of course they can delegate it down to the priest, but it ultimately is on his shoulders to make it happen.
What do you think about this?
The Bishop is the one who is actually administering the sacrament, though priest, teacher, deacon and elder may assist.
Consider
D&C 107:68-69
The Bishop is actually a high priest and not merely an elder. This verse is specific about the office of elder.