(ii)where tea bushes are planted in replacement of tea bushes that have died or have become permanently useless on any land already planted, [thirty per cent.] [Substituted by Act 13 of 1966, Section 8, for certain words (w.e.f. 1.4.1966).] of the actual cost of planting, shall, subject to the provisions of this section, [be allowed as a deduction in the manner specified hereunder, namely:- [Substituted by Act 13 of 1966, Section 8, for certain words (w.e.f. 1.4.1966).]