Immediate deduction for low-cost plant and machinery allowed in year of first use; disposal receipts and salary threshold rules also revised. Amendment permits full deduction in the year of first use for plant and machinery below a low-cost threshold. It revises the definition of 'moneys payable' to include insurance, salvage, compensation and sale proceeds, and applies a proportional adjustment for motor cars where a deeming rule fixes cost. It also replaces the prior monthly remuneration test with a test based on the amount of income chargeable under the head 'Salaries' being at or below a specified threshold.