'Office' in the Bible

And the children of Israel took their journey from Beeroth of the children of Jaakan to Mosera: there Aaron died, and there he was buried; and Eleazar his son ministered in the priest's office in his stead.

So you shall come to the Levitical priest or the judge who is in office in those days, and you shall inquire of them and they will declare to you the verdict in the case.

then both the men who have the dispute shall stand before the Lord, before the priests and the judges who will be in office in those days.

You shall go to the priest who is in office at that time and say to him, ‘I declare this day to the Lord my God that I have entered the land which the Lord swore to our fathers to give us.’