47 CFR §32.3400

1. (a)This account shall include:
   1. (1)The accumulated amortization associated with the investment contained in Account 2681, Finance leases.
   2. (2)the accumulated amortization associated with the investment contained in Account 2682, Leasehold improvements.
2. (b)This account shall be credited with amounts for the amortization of finance leases and leasehold improvements concurrently charged to Account 6563, Amortization expense—tangible. (Note also Account 3300, Accumulated depreciation—nonoperating.)
3. (c)When any item carried in Account 2681 or Account 2682 is sold, is relinquished, or is otherwise retired from service, this account shall be charged with the cost of the retired item. Remaining amounts associated with the item shall be debited to Account 7100, Other operating income and expenses, or Account 7300, Nonoperating income and expense, as appropriate.