No bond by its terms shall mature in more than fifty (50) years from its own date, and in the event any authorized issue is divided into two or more series or divisions, the maximum maturity herein authorized shall be calculated from the date on the face of each bond, separately, irrespective of the fact that different dates may be prescribed for the bonds of each separate series or division of any authorized issue.
(Added by Stats. 1957, Ch. 1056.)