130R107. A taxpayer may deduct an amount as additional depreciation in respect of property for which section 130R190 prescribes a separate class, to the extent that that amount does not exceed the lesser of(a) the taxpayer’s income for the year from that property, determined before any deduction under this section; and
(b) the undepreciated capital cost to the taxpayer of property of that class at the end of the taxation year, before any deduction under this section for the year.