Deduction for authors' royalty income limited by a fixed cap and repatriation plus certification requirements.
Clause 151 grants a deduction to resident individual authors for professional income from copyright assignment or royalties for literary, artistic, or scientific books (excluding textbooks), subject to a fixed monetary cap and a royalty to sales limit for non lump sum receipts. Foreign income qualifies only if repatriated in convertible exchange within a prescribed period and accompanied by prescribed certification, and claimants must submit payer verified certificates with returns; double deduction for the same income is expressly prohibited.