spawn_natural_disaster_contract_effect

spawn_natural_disaster_contract_effect = {
	if = {
		limit = {
			is_governor = yes
			trigger_if = {
				limit = { is_ai = yes }
				is_available = yes
			}
		}
		save_scope_as = governor
		# Select the Contract Tier (somewhat randomized, based on your experience as a governor)
		random_list = {
			30 = {
				save_scope_value_as = {
					name = governance_task_contract_tier
					value = define:NTaskContract|LOW_TASK_CONTRACT_TIER
				}
			}
			20 = {
				save_scope_value_as = {
					name = governance_task_contract_tier
					value = define:NTaskContract|MEDIUM_TASK_CONTRACT_TIER
				}

				modifier = {
					add = 10
					has_trait = governor
				}
				modifier = {
					add = 10
					has_trait = governor
					has_trait_xp = {
						trait = governor
						value >= 40
					}
				}
			}
			10 = {
				save_scope_value_as = {
					name = governance_task_contract_tier
					value = define:NTaskContract|HIGH_TASK_CONTRACT_TIER
				}

				modifier = {
					add = 10
					has_trait = governor
				}
				modifier = {
					add = 10
					has_trait = governor
					has_trait_xp = {
						trait = governor
						value >= 40
					}
				}
				modifier = {
					add = 20
					has_trait = governor
					has_trait_xp = {
						trait = governor
						value >= 80
					}
				}
			}
		}

		# Select which contract to create
		trigger_event = {
			on_action = spawn_natural_disaster_contract_on_action
		}

		play_sound_effect = "event:/DLC/EP4/SFX/UI/domicile_buildings/tgp_ui_domicile_building_archives_japanese"
	}
}

As written in game/common/scripted_effects/10_dlc_tgp_scripted_effects.txt.