BT Ḥul 138b(27) :בזמן דאיכ׳ קדשים לינהוג בזמן דליכא קדש׳ לא לינהוג‏ : when there are sancta (i.e. when the Temple is in existence) it would apply; when there are no sancta it would not apply
See the entire entry for bizmān d_ conj. when