character_is_valid_for_harrying_of_the_north_trigger

character_is_valid_for_harrying_of_the_north_trigger = {
	title:k_england.holder ?= { owns_story_of_type = story_cycle_harrying_of_the_north }
	trigger_if = {
		limit = { is_ruler = yes }
		OR = {
			this = title:k_england.holder
			any_liege_or_above = { this = title:k_england.holder }
		}
	}
	trigger_else = {
		domicile ?= {
			domicile_location = {
				county ?= {
					holder = {
						OR = {
							this = title:k_england.holder
							any_liege_or_above = { this = title:k_england.holder }
						}
					}
				}
			}
		}
	}
	OR = {
		character_is_valid_anglo_saxon_for_harrying_of_the_north_trigger = yes
		character_is_valid_norman_for_harrying_of_the_north_trigger = yes
	}
}

As written in game/common/scripted_triggers/00_laamp_triggers.txt.