Depreciation for power generating undertakings: actual cost method, optional written down value election, and tax treatment on asset disposal. Depreciation for power generating undertakings is allowed on assets used in generation or generation and distribution of power, with ownership and business-use conditions, and is computed on actual cost at Appendix II rates under the new provision. The undertaking may opt for written down value depreciation, but the election must be made by the return-filing due date for the year power generation begins and then remains final for later years. Under the earlier regime, straight line or written down value methods applied, and sale or destruction of a depreciable asset could trigger terminal depreciation, balancing charge, or capital gains treatment.