grand_activity_participation_legitimacy_effect

grand_activity_participation_legitimacy_effect = {
	if = {
		limit = { is_valid_for_legitimacy_change = yes }
		if = {
			limit = {
				scope:activity = {
					has_activity_type = activity_tour
					has_activity_option = {
						category = special_type
						option = tour_type_majesty
					}
				}
			}
			add_legitimacy = major_legitimacy_gain
		}
		else_if = {
			limit = {
				this = scope:host
			}
			add_legitimacy = medium_legitimacy_gain
		}
		else = {
			add_legitimacy = minor_legitimacy_gain
		}
	}
}

As written in game/common/scripted_effects/06_dlc_ce1_legitimacy_effects.txt.