The Ronpibon Tin NL case is authority for the view that the general deduction provision in s 8-1 has the following effect: Question 3Answer a. If a loss or outgoing is necessary it is not for the Commissioner to decide the amount that is reasonable for a taxpayer to expend. b. Deductible amounts cannot to be apportioned. c. If a business is suspended for a period of time there are no deductions allowed. d. An Australian company cannot claim deductions for costs relating to activities outside the country