Their assigned responsibility was to take care of the Tabernacle's frames, crossbars, posts, stands, all its equipment, and everything connected with their use,
The camp of Moses, Aaron, and Aaron's sons was to the east of the Tabernacle, in the direction of the sunrise, in front of the Tent of Meeting. They were responsible for the sanctuary on behalf of the Israelites. Anyone else who tried to act as a priest was to be executed.