(1) If a fiduciary receives a payment from interest or other current return and from other proceeds of the collateral financial assets, the fiduciary shall allocate to income the portion of the payment which the payer identifies as being from interest or other current return and shall allocate the balance of the payment to principal.

(2) If a fiduciary receives one or more payments in exchange for the fiduciary's entire interest in an asset-backed security in one accounting period, the fiduciary shall allocate the payments to principal. If a payment is one of a series of payments that will result in the liquidation of the trust's interest in the security over more than one accounting period, the fiduciary shall allocate 10 percent of the payment to income and the balance to principal.