valid_for_byz_governor_content_trigger

valid_for_byz_governor_content_trigger = {
	has_ep3_dlc_trigger = yes
	is_governor = yes
	top_liege.culture = {
		OR = {
			has_cultural_pillar = heritage_byzantine
			has_cultural_pillar = heritage_caucasian
		}
	}
	top_liege = {
		OR = {
			is_roman_emperor_primary_title_trigger = yes
			AND = {
				culture = {
					OR = {
						this = culture:greek
						any_parent_culture_or_above = { this = culture:greek }
					}
				}
				highest_held_title_tier >= tier_empire
			}
		}
	}
}

As written in game/common/scripted_triggers/07_ep3_triggers.txt.