(1) A claimant shall not be entitled to an allowance, deduction or relief under the provisions specified in the Table to section 458 in respect of any income the tax on which the claimant is entitled to charge against any other person, or to deduct, retain or satisfy out of any payment which the claimant is liable to make to any other person.

(2) Except where otherwise provided, any allowance, deduction or relief under the provisions specified in the Table to section 458 shall be given either by discharge or reduction of the assessment, or by repayment of the excess which has been paid, or by all of those means, as the case may require.

(3) Any claim shall be accompanied by a declaration and statement in the prescribed form signed by the claimant setting out-

(a) all the particular sources from which the claimant's income arises and the particular amount arising from each source,

(b) all particulars of any yearly interest or other annual payments reserved or charged on the claimant's income, whereby the claimant's income is or may be diminished, and

(c) all particulars of sums which the claimant has charged or may be entitled to charge on account of tax against any other person, or which the claimant has deducted, or may be entitled to deduct, out of any payment to which the claimant is or may be liable.

(4)(a) The claim shall be made and proved in accordance with the powers and provisions under which tax under Schedule D is ascertained and charged.

(b) Where a claimant is not in the State, an affidavit stating the particulars required by the Income Tax Acts, and taken before any person who has authority to administer in the place where the claimant resides an oath with regard to any matter relating to the public revenue of the State, may be received by the Revenue Commissioners.

(c) Where satisfactory proof is given that a claimant is unable to attend in person, a claim on the claimant's behalf may be made by any guardian, trustee, attorney, agent or factor acting for the claimant.

(d) Where a person is assessable on behalf of any other person, such person may make a claim on behalf of that other person.

(5) Subsections (3) and (4) shall not apply, except where the Revenue Commissioners otherwise direct, in relation to a claim which falls to be taken into account-

(a) in the making of deductions or repayments of tax under Chapter 4 of Part 42 and the regulations made under that Chapter, or

(b) except in the case of a chargeable person (within the meaning of section 950), in relation to a repayment of tax deducted under that Chapter and those regulations.

(6) Where, on the basis of the information furnished to them under section 894A(2) or any other information in their possession, the Revenue Commissioners are satisfied as to the title of an individual to relief under any of the provisions specified in the Table to section 458 or under [section 188]¹ then, notwithstanding any other provision of the Income Tax Acts to the contrary, if the Revenue Commissioners consider it appropriate in the circumstances, the relief due may be given to the individual without the making of and proving of a claim for that relief.