In spite of their inclusion in the tier-one list , national central banks may decide not to accept the following instruments as underlying assets :  debt instruments falling due for repayment before the maturity date of the monetary policy operation for which they are being used as underlying assets ( 48 ) , and  debt instruments with an income flow ( e.g. a coupon payment ) occurring in the period until the maturity date of the monetary policy operation for which they are being used as underlying assets .
Liikmesriikide keskpangad võivad otsustada mitte aktsepteerida alusvarana järgmisi instrumente hoolimata nende kuulumisest esimese astme loetellu : --- võlainstrumendid , mille tagasimaksmise tähtaeg on enne selle rahapoliitika toimingu , mille alusvarana neid kasutatakse , ( 48 ) tähtpäeva , ja --- võlainstrumendid , millest saadakse tulu ( nt kupongimaksed ) kuni selle rahapoliitika toimingu tähtpäevani , mille alusvarana neid kasutatakse .