4. The conditions to be fulfilled by a person referred to in paragraph 3 of this Order are—

(a) he shall claim a refund of the tax by completing such claim form as may be provided for the purpose by the Revenue Commissioners and he shall certify the particulars shown in such claim form to be correct;

(b) he shall establish that the caravan in relation to which a claim for a refund of the tax arises—

(i) is used by him as a permanent residence for himself and that neither he nor (if he is a married man having his spouse living with him) his spouse has any other place of abode within the State available for his occupation, or

(ii) is, in the case of a local authority, occupied as a residence by a tenant of the local authority;

(c) he shall, in the case of a person other than a local authority, by the production of a certificate from the appropriate local authority or such other documentary evidence as may be acceptable to the Revenue Commissioners, establish that the caravan has been rated under the Valuation Acts;

(d) he shall, by the production of invoices, provided in accordance with section 17 (12) (a) (i) of the Act, or by the production of receipts for tax paid on importation, establish the amount of tax borne or paid by him in relation to the caravan excluding any amount referable to articles of furniture or equipment which would not be regarded as fixtures if the caravan were regarded as immovable goods at the time of its supply or importation;

(e) he shall establish the net tax-exclusive amount of the consideration for the supply to him of the caravan, or, if the caravan was imported by him, its net tax-exclusive value, exclusive, in either case, of the amount, if any, included in such consideration or value for the supply or importation of such articles as are referred to in subparagraph (d) of this paragraph;

(f) he shall establish that he is not entitled to a deduction under section 12 of the Act for any portion of the tax specified in subparagraph (d) of this paragraph.