What does Ezekiel 40:46 mean?

And the room facing north is for the priests who are in charge of the altar. These are the descendants of Zadok, the only Levites allowed to come near the Lord to serve him.' Ezekiel 40:46 - Modern Text Bible

(This room was for the priests who served at the altar, specifically the family of Zadok, who had a unique privilege to approach God.)