4. Issued on such plan or plans of payment and in such series or classes as the bylaws may provide, which plan or plans of payment may include:
- (a) Regular installment plan with agreed weekly or monthly payments, with dividends credited to or in behalf of the account until the ultimate value agreed on in the subscription is reached.
- (b) Full paid plan with one single payment of $100 per unit and dividends payable in cash unless by agreement credited to the account.
- (c) Prepaid plan with one single payment in such amount per unit as is set forth in the bylaws and dividends credited to such account until the ultimate value of $100 per unit is reached.
- (d) Optional plan with payments in such amount or amounts and at such times as the holder may elect and dividends credited to such account unless by agreement payable in cash.
- (e) Any other plan of payment which the deputy director may approve as conforming to sound savings and loan practice.