Charles Ellicott Commentary Leviticus 16:33

"and he shall make atonement for the holy sanctuary; and he shall make atonement for the tent of meeting and for the altar; and he shall make atonement for the priests and for all the people of the assembly." — Leviticus 16:33 (ASV)

And he shall make an atonement. —Like Aaron, the successor to the pontificate is to perform the service of expiation as detailed in this chapter, a summary of which is here given.