"51(1) [Deductions for losses and outgoings] All losses and outgoings to the extent to which they are incurred in gaining or producing the assessable income, or are necessarily incurred in carrying on a business for the purpose of gaining or producing such income, shall be allowable deductions except to the extent to which they are losses or outgoings of capital, or of a capital, private or domestic nature, or are incurred in relation to the gaining or production of exempt income.
53(1) [Deduction allowable] Expenditure incurred by the taxpayer in the year of income for repairs, not being expenditure of a capital nature, to any premises, or part of premises, plant, machinery, implements, utensils, rolling stock, or articles held, occupied or used by him for the purpose of producing assessable income, or in carrying on a business for that purpose, shall be an allowable deduction.
54(1) [Depreciation deductible] Depreciation during the year of income of any property, being plant or articles owned by a taxpayer and used by him during that year for the purpose of producing assessable income, and of any property being plant or articles owned by the taxpayer which has been installed ready for use for that purpose and is during that year held in reserve by him shall, subject to this Act, be an allowable deduction.
55(1) [Calculation of percentage] The annual depreciation percentage for a unit of property owned by a taxpayer is worked out as follows.
55(2) Step 1: 100% depreciation. If:
(a) either:
(i) the cost of the property does not exceed $300 or such higher amount as is prescribed; or
(ii) the effective life of the property is less than 3 years; and
(b) the taxpayer does not nominate, in accordance with subsection (8), an annual depreciation percentage less than 100%;
the annual depreciation percentage is 100%.
72(1) [Allowable deductions] Sums for which the taxpayer is personally liable and which are paid in Australia by him in the year of income for
(a) rates which are annually assessed; or
(b) land tax imposed under any law of a State or of a Territory being part of Australia (other than taxes which are deductible under section 17 of the Estate Duty Assessment Act 1914-1940),
shall be allowable deductions.
72(1B) [Conditions for deduction] A deduction is not allowable under this section in respect of an amount paid by a taxpayer unless
(a) the amount is paid in respect of land that is, or premises that are, used by the taxpayer during the year of income for the purpose of gaining or producing income or carrying on a business for the purpose of gaining or producing income; or
(b) not relevant_."_