The value of a bond is its stated face value or maturity value, and its coupon interest rate is the stated annual interest rate on the bond. The maturity date is the date on which the par value must be repaid. A provision gives the issuer the right to redeem the bonds under specified terms prior to their normal maturity date, although not all bonds have this provision. Some bonds have provisions which require the issuer to systematically retire a portion of the bond issue each year. Because sinking fund provisions facilitate their orderly retirement, bonds with these provisions are regarded as being so they will have coupon rates than similar bonds without these provisions.