diarch_swing_scales_valid_shared_hof_trigger

diarch_swing_scales_valid_shared_hof_trigger = {
	# You must share a HoF to be able to petition one.
	custom_tooltip = {
		text = swing_scales_currency_interaction.tt.no_shared_hof
		exists = scope:actor.religious_head_or_challenger
		exists = scope:recipient.religious_head_or_challenger
		scope:actor.religious_head_or_challenger = scope:recipient.religious_head_or_challenger
	}
	# And opinions've gotta line up.
	trigger_if = {
		limit = { exists = scope:actor.religious_head_or_challenger }
		# They must like you.
		custom_tooltip = {
			text = swing_scales_currency_interaction.tt.hof_needs_to_like_you_more
			scope:actor.religious_head_or_challenger = {
				opinion = {
					target = scope:actor
					value >= high_positive_opinion
				}
			}
		}
		# And not like scope:recipient too much.
		custom_tooltip = {
			text = swing_scales_currency_interaction.tt.hof_needs_to_like_them_less
			scope:actor.religious_head_or_challenger = {
				opinion = {
					target = scope:recipient
					value <= medium_positive_opinion
				}
			}
		}
		# Plus scope:recipient can't have anything over them.
		custom_tooltip = {
			text = swing_scales_currency_interaction.tt.hof_refuses_to_cross_recipient
			NOT = {
				scope:recipient = { has_strong_hook = scope:actor.religious_head_or_challenger }
			}
		}
	}
}

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