(a) A trustee may transfer an appropriate amount from income to principal in one or more accounting periods to reimburse principal or to provide a reserve for future disbursements if the trustee makes or expects to make a disbursement from principal that is allocable to income under AS 13.38.800 or 13.38.820 and that is paid from principal because it is unusually large, or is made to prepare property for rental, including tenant allowances, leasehold improvements, and broker's commissions.
(b) If the asset whose ownership gives rise to the disbursements becomes subject to a successive income interest after an income interest ends, a trustee may continue to transfer amounts from income to principal as provided in (a) of this section.
(c) This section does not apply to the extent the trustee has been or expects to be reimbursed by a third party.