assign_tribal_governments_effect

assign_tribal_governments_effect = {
	if = {
		limit = {
			has_tgp_dlc_trigger = yes
			OR = {
				government_has_flag = government_is_wanua
				scope:old_government ?= government_type:wanua_government
				scope:capital_county.title_province ?= {
					geographical_region = world_asia_southeast_islands
				}
			}
		}
		change_government = wanua_government
	}
	else = {
		change_government = tribal_government
	}
}

As written in game/common/scripted_effects/00_government_effects.txt.