Joshua gathered all the tribes of Israel to Shechem and called for the elders of Israel, for their heads, for their judges and for their officers; and they presented themselves before God.
“and they presented themselves before God.” They seem not to be in front of the Tabernacle, because it was at Shiloh (Josh. 18:1). So they were before God in the sense that they were before the representatives of God, Joshua, and likely the priests.