(a) Requirement of retention--Every institution shall retain in such form and manner that they may be readily produced upon proper demand each record of original or final entry, and each deposit or withdrawal slip or ticket, for a period of seven years from the date of the making of the last entry thereon, except that coupons accompanying deposits in a club account, such as a Christmas club or a vacation club, need not be so retained for more than two years from the date of closing of such account.

(b) Originals required and copies permitted--All records required to be retained under subsection (a) of this section shall be retained in their original form except that, in lieu of the originals, film, photographic, photostatic or other copies which accurately reproduce all lines and markings on the originals may be kept of:

(c) Admissibility of copies in evidence--Any copy of a record permitted to be kept in lieu of the original under subsection (b) of this section shall be admissible in evidence in any proceeding with the same effect as though it were the original.