Section 54-65 - Deed of trust(a) To secure the payment of such bonds, the land mortgage association shall issue a collateral deed of trust to the State Treasurer, pledging as security for such bonds the notes and mortgages taken or purchased, as provided herein, in an amount equal to or exceeding the aggregate amount of bonds issued or to be issued.(b) The total amount of bonds actually outstanding shall not at any time exceed the total amount unpaid upon the notes secured by the mortgages belonging to the association and pledged for the payment of the bonds, plus such securities and moneys as may be on deposit with the State Treasurer under the provisions hereof.(c) The aggregate amount of the principal of all bonds issued by land mortgage associations and outstanding at any one time shall not exceed 20 times the amount of the capital and surplus of the company.