In the tabernacle of the congregation without the vail, which is before the testimony, Aaron and his sons shall order it from evening to morning before the LORD: it shall be a statute for ever unto their generations on the behalf of the children of Israel.
In the tent where the people gather, behind a curtain, Aaron and his sons will take care of things from evening to morning for the Lord. This will always be a rule for them and their descendants, for the benefit of the Israeli people.