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Clergymen and ministers of religion: deduction. 
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544.—(1) In assessing the tax chargeable under any Schedule upon a clergyman or minister of any religious denomination, the following deductions may be made from any profits, fees or emoluments of his profession— 
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(a) any sums of money paid or expenses incurred by him wholly, exclusively, and necessarily in the performance of his duty as a clergyman or minister; 
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(b) such part of the rent (not exceeding one-eighth), as the commissioners or inspector by whom the assessment is made may allow, paid by him in respect of a dwelling-house any part of which is used mainly and substantially for the purposes of his duty as such clergyman or minister; 
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and where any such clergyman or minister is in the occupation of a dwelling-house, but pays no rent therefor, he shall for the purposes of the foregoing provision be deemed to pay a rent equal to the annual value of the dwelling-house as assessed to tax under Schedule A. 
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(2) If no such deduction has been made, a proportionate part of the tax paid by him shall be repaid to the clergyman or minister on proof to the Special Commissioners that any sum has been expended as aforesaid. 
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