Any native who by ascension in the age group system, gets to the seventh age group will after the next six years become an Ero graduate. The day when all the graduates are marking their graduation from the youthful and semi-adult ages to full adult age is the day usually marked for the main celebration, and which is called Ero. After this festival, they (the Ero graduates) become community elders and will no longer be required to participate in the communal manual work. They can, however, render assistance on advisory capacities voluntarily.