Perquisite valuation rule: accommodation placed at employee's disposal deemed enjoyed even during absence, triggering reassessment where undervalued. Valuation of the perquisite of rent free or concessional accommodation must include all periods during which the accommodation is placed at the employee's disposal, even if not physically occupied; leave and official tour periods cannot be excluded. Income tax officers are to note this principle and re open assessments where valuation was done differently so that any additional demand may be raised and collected.