(gA) an allowance in respect of any expenditure (other than expenditure which has qualified in whole or part for deduction or allowance under any of the other provisions of this section or the corresponding provisions of any previous Income Tax Act) actually incurred by the taxpayer –
(i) in devising or developing any invention as defined in the Patents Act or in creating or producing any design as defined in the Designs Act or any trade mark as defined in the Trade Marks Act or any copyright as defined in the Copyright Act or any other property which is of a similar nature;
(ii) in obtaining any patent or the restoration of any patent under the Patents Act or the registration of any design under the Designs Act or the registration of any trade mark under the Trade Marks Act or under similar laws of any other country; or
(iii) in acquiring by assignment from any other person any such patent, design, trade mark or copyright or in acquiring any other property of a similar nature or any knowledge essential to the use of such patent, design, trade mark, copyright or other property or the right to have such knowledge imparted,
if such invention, patent, design, trade mark, copyright, other property or knowledge, as the case may be, is used by the taxpayer in the production of his income: Provided that –
(aa) where such expenditure exceeds R5 000, and was incurred –
(A) before 29 October 1999, the allowance shall not exceed for any one year such portion of the amount of the expenditure as is equal to such amount divided by the number of years, which represents the probable duration of use of the invention, patent, design, trade mark, copyright, other property or knowledge, or four per cent of the said amount, whichever is the greater;
[Subitem (A) substituted by section 18 of Act 25 of 2015 effective on 8 January 2016]
(B) on or after 29 October 1999, the allowance shall not for any one year exceed an amount equal to –
(AA) five per cent of the amount of the expenditure in the case of any invention, patent, trade mark, copyright or other property of a similar nature or any knowledge essential to the use of such invention, patent, trade mark, copyright or other property or the right to have such knowledge imparted; or
(BB) 10 per cent of the amount of the expenditure in the case of any design or other property of a similar nature or any knowledge essential to the use of such design or other property or the right to have such knowledge imparted;
(bb) where such expenditure was incurred before the commencement of the year of assessment in question the allowance shall be calculated on the amount of such expenditure, less an amount equivalent to the sum of the allowances to which the taxpayer was entitled under this paragraph and the allowances to which the taxpayer would have been entitled under this paragraph if this paragraph had been applicable, in respect of such expenditure in respect of previous years of assessment, including any year of assessment under any previous Income Tax Act;
[Item (bb) substituted by section 10 of Act 94 of 1983 and section 18 of Act 25 of 2015 effective on 8 January 2016]
(cc) no allowance shall be made in respect of any such invention, patent, design, trade mark, copyright or other property or knowledge so acquired or obtained by the taxpayer on or after 24 June 1988, but prior to 1 July 1993 from any other person who is a resident of the Republic or who is ordinarily resident in a neighbouring country (or, in the case of a company, is incorporated or has its place of effective management in a neighbouring country), if –
(A) the taxpayer or such other person is a company and such other person or the taxpayer, as the case may be, is interested in more than 50 per cent of any class of shares issued by such company, whether directly as a holder of shares in that company or indirectly as a holder of shares in any other company; or
(B) both the taxpayer and such other person are companies and any third person is interested in more than 50 per cent of any class of shares issued by one of those companies and in more than 50 per cent of any class of shares issued by the other company, whether directly as a holder of shares in the company by which the shares in question were issued or indirectly as a holder of shares in any other company;
(dd) where any such invention, patent, design, trade mark, copyright or other property or knowledge was so acquired or obtained by the taxpayer on or after 1 July 1993 from any other person who is a resident of the Republic or who is ordinarily resient in a neighbouring country (or, in the case of a company, is incorporated or has its place of effective management in a neighbouring country), and who is a connected person in relation to the taxpayer, the allowance under this paragraph shall be calculated on an amount not exceeding the lesser of the cost of such invention, patent, design, trade mark, copyright or other property or knowledge to such connected person or the market value thereof as determined on the date upon which such invention, patent, design, trade mark, copyright or other property or knowledge was acquired or obtained by the taxpayer;
(ee) no allowance shall be made in respect of any expenditure incurred by such taxpayer on or after 29 October 1999, in respect of the acquisition from any other person of any trade mark or other property of a similar nature or any knowledge essential to the use of such trade mark or the right to have such knowledge imparted;
(ff) no deduction shall be allowed under this paragraph in respect of any expenditure incurred by the taxpayer during any year of assessment commencing on or after 1 January 2004;