567.9. The bonds or other evidences of indebtedness or securities forming part of the debt of the council on 4 June 1985 constitute a direct, general and unconditional undertaking of the council, the school boards and the confessional school boards; the bonds or other evidences of indebtedness or securities issued by a confessional school board must rank concurrently and pari passu with all other undertakings of the Conseil scolaire de l’île de Montréal and of the school boards of the island of Montréal in respect of loans of money not secured by hypothec or other encumbrance.