48. The corporation must keep at its corporate seat one or more registers containing(a) a copy of the letters patent incorporating it and of its supplementary letters patent, if any;
(b) the by-laws made in the exercise of the powers conferred by this act;
(c) the names and corporate seats of each member, indicating, as regards each, the date of its admission and the date when it ceases to be a member;
(d) the name in full, nationality, address and occupation of each delegate of a member and of each visitor of the corporation, indicating, as regards each, the date of his appointment and the date when he ceased to hold office;
(e) the debts secured by hypothec on its immoveables, indicating for each the principal sum, a summary description of the immoveables hypothecated and the name of the creditor or, as regards bond issues, the name of the trustee.