choose_and_assign_appropriate_councillor_position_effect

choose_and_assign_appropriate_councillor_position_effect = {
	scope:court_owner = {
		if = {
			limit = {
				OR = {
					NOT = { exists = cp:councillor_$PREFERRED_POSITION$ }
					cp:councillor_$PREFERRED_POSITION$ ?= {
						can_be_fired_from_council_trigger = { COURT_OWNER = scope:court_owner }
					}
				}
			}
			assign_councillor_type = {
				type = councillor_$PREFERRED_POSITION$
				target = scope:new_councillor
				remove_existing_councillor = yes
			}
		}
		else_if = {
			limit = {
				OR = {
					NOT = { exists = cp:councillor_$FALLBACK_1$ }
					cp:councillor_$FALLBACK_1$ ?= {
						can_be_fired_from_council_trigger = { COURT_OWNER = scope:court_owner }
					}
				}
			}
			assign_councillor_type = {
				type = councillor_$FALLBACK_1$
				target = scope:new_councillor
				remove_existing_councillor = yes
			}
		}
		else_if = {
			limit = {
				OR = {
					NOT = { exists = cp:councillor_$FALLBACK_2$ }
					cp:councillor_$FALLBACK_2$ ?= {
						can_be_fired_from_council_trigger = { COURT_OWNER = scope:court_owner }
					}
				}
			}
			assign_councillor_type = {
				type = councillor_$FALLBACK_2$
				target = scope:new_councillor
				remove_existing_councillor = yes
			}
		}
		else_if = {
			limit = {
				OR = {
					NOT = { exists = cp:councillor_$FALLBACK_3$ }
					cp:councillor_$FALLBACK_3$ ?= {
						can_be_fired_from_council_trigger = { COURT_OWNER = scope:court_owner }
					}
				}
			}
			assign_councillor_type = {
				type = councillor_$FALLBACK_3$
				target = scope:new_councillor
				remove_existing_councillor = yes
			}
		}
		else_if = {
			limit = {
				OR = {
					NOT = { exists = cp:councillor_$FALLBACK_4$ }
					cp:councillor_$FALLBACK_4$ ?= {
						can_be_fired_from_council_trigger = { COURT_OWNER = scope:court_owner }
					}
				}
			}
			assign_councillor_type = {
				type = councillor_$FALLBACK_4$
				target = scope:new_councillor
				remove_existing_councillor = yes
			}
		}
		else = {
			# shouldn't happen, if before using the assign_appropriate_councillor_position_effect you check that any councilor can be fired
		}
	}
}

As written in game/common/scripted_effects/00_councillor_effects.txt.