D&C 20

This morning I noticed two distinct instructions to the early saints.  First concerning baptism -

"The person who is called of God and has authority from Jesus Christ to baptize, shall go down into the water with the person who has presented himself or herself for baptism..."  (Doctrine and Covenants 20:73)

Not only is the person baptized to fully immersed in water but the person authorized shall also go down into the water.

The second is in regards to the administration of the sacrament -

"...the elder or priest shall administer it; and after this manner shall he administer it—he shall kneel with the church..."  (Doctrine and Covenants 20:76)

Those words suggest to me that the recipient saints were also to kneed.  I would suspect that this was the case in the early days of the Church but as of late, that was changed by revelation.