ep3_dynasty_legacy_add_legitimacy_effect

ep3_dynasty_legacy_add_legitimacy_effect = {
	scope:activity = {
		if = {
			limit = {
				scope:host = {
					government_has_mechanic = administrative
					OR = {
						dynasty = { has_dynasty_perk = ep3_administrative_legacy_3 }
						top_participant_group:dynastic_cycle ?= {
							participant_group_type = conservative_movement
						}
					}
				}
				# Does the activity location have a domicile owned by a house member
				# Does that domicile have the Reception Hall building
				activity_location = {
					any_province_domicile = {
						owner = { house ?= scope:host.house }
						OR = {
							has_domicile_building_or_higher = reception_hall_01
							has_domicile_building_or_higher = east_asian_estate_reception_hall_01
						}
					}
				}
			}
			activity_location = {
				random_province_domicile = {
					limit = {
						owner = { house ?= scope:host.house }
						OR = {
							has_domicile_building_or_higher = reception_hall_01
							has_domicile_building_or_higher = east_asian_estate_reception_hall_01
						}
					}
					owner = { save_scope_as = reception_hall_owner }
				}
			}
			scope:host = {
				house = {
					if = {
						limit = {
							NOT = {
								has_variable = ep3_legacy_legitimacy_counter
							}
						}
						# Set the initial value
						set_variable = {
							name = ep3_legacy_legitimacy_counter
							value = 10
						}
					}
					else = {
						change_variable = {
							name = ep3_legacy_legitimacy_counter
							add = 10
						}
					}
				}
				if = {
					limit = {
						primary_title.tier >= tier_empire
					}
					send_interface_toast = {
						type = event_toast_effect_good
						title = ep3_dynasty_legacy_gain_legitimacy_effect_title
						left_icon = scope:host
						right_icon = scope:host.primary_title
						add_legitimacy = 10
					}
				}
				else = {
					house = {
						every_house_member = {
							limit = { is_ai = no }
							send_interface_message = {
								type = event_generic_good_text
								title = ep3_dynasty_legacy_add_legitimacy_effect_title
								desc = ep3_dynasty_legacy_add_legitimacy_effect_desc
								left_icon = scope:host
								right_icon = house
							}
						}
					}
				}
			}
		}
	}
}

As written in game/common/scripted_effects/07_dlc_ep3_scripted_effects.txt.