National Interbank Funding Center, Rules for the Transfer of Matured and Defaulted Bonds on the Interbank Market

Applicability: For the purposes of these Rules, the term "matured and defaulted" means that the principal of, or coupon on, a bond cannot be paid punctually and in full on the maturity redemption date specified in the bond offering documents, or that a bond is called early due to a statutory or contractual reason, such as bankruptcy, and the principal of, or coupon on, the bond cannot be paid punctually and in full (Article 2).