Sec. 664.6. Depreciation and amortization subsidiary records  


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  • (a) Subsidiary record categories shall be maintained for each class of depreciable telecommunications plant in account 3100 for which there is a prescribed depreciation rate. (See also section 664.1[c] of this Part.)
    (b) Subsidiary records shall be maintained for accounts 3410, 3420, 3500, and 3600 in accordance with section 664.5(d) of this Part.