A deposit is a special deposit if it is:

1. (1) A deposit of funds in a bank under an account agreement;
2. (2) For the benefit of at least two beneficiaries, one or more of which may be a depositor;
3. (3) Denominated in a medium of exchange that is currently authorized or adopted by a domestic or foreign government;
4. (4) For a permissible purpose stated in the account agreement; and
5. (5) Subject to a contingency.