Any funds in excess of one hundred dollars that are paid to an adult family home as a security deposit or as prepayment for charges beyond the first month's residency:

(1) Must be deposited by the adult family home in an interest bearing account that is separate from any of the home's operating accounts and credits all interest earned on the resident's funds to that account. The adult family home must:

(a) Ensure that a record of the account is available upon the request of the resident or their representative;

(b) Not commingle resident funds from these accounts with the adult family home's funds or with the funds of any person other than another resident. If resident funds are commingled, the home must provide each resident with a separate accounting for their share;

(c) Ensure that the account or accounts are held in a financial institution as defined in RCW 30.22.041, and notify each resident in writing of the name, address, and location of the depository.