tgp_silk_road_downstream_peace_message_effect

tgp_silk_road_downstream_peace_message_effect = {
	every_player = {
		tgp_silk_road_downstream_player_sub_region_effect = yes
		if = {
			limit = { exists = scope:player_sub_region_temp }
			send_interface_message = {
				type = msg_silk_road_prosperity_peace_good
				title = msg_silk_road_prosperity_upstream_peace
				desc = tgp_silk_road_move_sub_region_towards_exceptional_bounty_tt
				scope:player_sub_region_temp = {
					if = {
						limit = { sub_region_current_phase = phase_hardship }
						if = {
							limit = { this = scope:origin_sub_region_temp }
							custom_tooltip = tgp_silk_road_move_sub_region_towards_steady_trading_primary_tt
						}
						else_if = { 
							limit = { is_in_list = second_sub_regions }
							custom_tooltip = tgp_silk_road_move_sub_region_towards_steady_trading_secondary_tt
						}
						else = { custom_tooltip = tgp_silk_road_move_sub_region_towards_steady_trading_tertiary_tt }
					}
					else_if = {
						limit = {
							NOT = { sub_region_current_phase = phase_exceptional_bounty }
						}
						if = {
							limit = { this = scope:origin_sub_region_temp }
							custom_tooltip = tgp_silk_road_move_sub_region_towards_exceptional_bounty_primary_tt
						}
						else_if = {
							limit = { is_in_list = second_sub_regions }
							custom_tooltip = tgp_silk_road_move_sub_region_towards_exceptional_bounty_secondary_tt
						}
						else = { custom_tooltip = tgp_silk_road_move_sub_region_towards_exceptional_bounty_tertiary_tt }
					}
				}
			}
		}
	}
}

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