In 1867, one of the leaders of the parliamentary opposition to Napoleon, Jules Ferry, ridiculed the accounting practices of Haussmann as "Les Comptes fantastiques d'Haussmann" ("The fantastic (bank) accounts of Haussmann"), a play-on-words based on the "Les Contes d'Hoffman" Offenbach operetta popular at the time. In the autumn of 1867, the voucher program was ruled as official debt by the Court of Accounts, rather than as the "deferred payments" which Haussmann argued they were. This made the voucher scheme illegal, since the City of Paris had not obtained the permission of the Legislative Assembly before borrowing. The City was forced to enter into renegotiations with the Crédit Foncier to convert the vouchers into regular debt. Two separate agreements were made with the Crédit Foncier; the city agreed to repay 465 million francs in total over 40 years and 39 years respectively. The debates in the Legislative Assembly surrounding the authorization of these new agreements lasted 11 sessions, with critics attacking Haussmann's borrowing, his questionable funding mechanisms, and the City of Paris's governing structure. The result was a new law, passed on April 18, 1868, which gave the Legislative Assembly oversight of the city's finances.