The district tax office director may make a Reassessment or Tax-Office Decision with respect to a Resident's income taxes by estimating the Resident's Income in Each Class or the loss for the year (other than real property income, business income, timber income, or the resulting loss when any of these is calculated, for a year in which the Resident has filed a Blue Return), in light of increases and decreases in assets or liabilities, revenue or expenses, production volumes, sales volumes or other transaction volumes, the number of employees, or the scope of business.