Among those yam tributes, the most important feasts called kamadipw en wahu ('feast of honor') and kamwadipw en kousapw ('feast of section') are annually given to pay respect to the Nahnmwarki (paramount chief) and section chief respectively at the height of the yam season around September-November, in which kehi (uncooked clusters of yam tubers) are used as tribute. The German colonial regime authorized the Nahnmwarki to have these feasts in 1912, when the Germans privatilized land previously owned by the Nahnmwarki and curtailed the feasts for economic development.