Credit union membership consists of the incorporators and other persons and incorporated and unincorporated organizations, to the extent permitted by regulations adopted by the commissioner, elected to membership. Each member shall subscribe to at least one share of the stock of the credit union and pay the initial installment on the stock and a uniform entrance fee if required by the board of directors of the credit union. Credit union membership is limited to groups having a common bond of occupation or association, or to groups within a well-defined neighborhood, community, or rural district. Shares may be issued in joint tenancy with right of survivorship with a person designated by the credit union member. A joint tenant may not be permitted to vote, obtain loans, or hold office, unless the joint tenant is within the field of membership and is qualified for membership.