akolouthos_validity_trigger

akolouthos_validity_trigger = {
	base_court_position_validity_trigger = { EMPLOYER = $EMPLOYER$ }
	is_landed = no
	court_position_can_be_combatant_tt_trigger = { EMPLOYER = $EMPLOYER$ } # check culture of warrior not liege
	custom_tooltip = {
		text = NONE_NOT_THE_SPOUSE_OF_CHARACTER_COURT_POSITION
		NOT = { is_spouse_of = $EMPLOYER$ }
	}
	OR = {
		culture = {
			OR = {
				custom_tooltip = {
					text = court_position_fp1_coastal_warriors
					has_cultural_tradition = tradition_fp1_coastal_warriors
				}
				custom_tooltip = {
					text = court_position_hird
					has_cultural_tradition = tradition_hird
				}
				custom_tooltip = {
					text = court_position_fp1_performative_honour
					has_cultural_tradition = tradition_fp1_performative_honour 
				}
				custom_tooltip = {
					text = court_position_north_germanic
					has_cultural_pillar = heritage_north_germanic
				}
				custom_tooltip = {
					text = court_position_west_germanic
					has_cultural_pillar = heritage_west_germanic
				}
			}
		}
		AND = {
			has_trait = loyal
			culture = {
				NOR = {
					custom_tooltip = {
						text = court_position_not_same_culture_heritage
						has_same_culture_heritage = $EMPLOYER$.culture
					}
					custom_tooltip = {
						text = court_position_not_same_culture_language
						has_same_culture_language = $EMPLOYER$.culture
					}
				}
			}
		}
	}
	custom_tooltip = {
		text = none_does_not_have_a_full_time_job
		trigger_if = {
			limit = { NOT = { has_court_position = akolouthos_court_position } }
			court_position_does_not_already_have_a_job_trigger = yes # This positions is considered a job, and cannot be held at the same time as another similar position
		}
	}
}

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