Savings accounts may be opened and held solely and absolutely in his own right by, or in trust or other fiduciary capacity for, any person, including an adult or minor individual, male or female, single or married, partnership, association, fiduciary, corporation or by a political subdivision or public or governmental unit, but only to the extent expressly authorized by the statutes of this state. Savings accounts shall be represented only by the account of each savings account holder on the books of the association, and such accounts or any interest therein shall be transferable only on the books of the association and upon proper written application by the transferee and upon acceptance by the association of the transferee as a savings account holder upon terms approved by the board of directors. The association may treat the holder of record of a savings account as the owner thereof for all purposes.