Section 112(b) in The Companies (Accounting Standards) Rules, 2006
(b)amends the terms of a defined benefit plan such that a material element of future service by current employees will no longer qualify for benefits, or will qualify only for reduced benefits a curtailment may arise from an isolated event, such as the closing of a plant, discontinuance of an operation or termination or suspension of a plan. An event is material enough to qualify as a curtailment if the recognition of a curtailment gain or loss would have a material effect on the financial statements. Curtailments are often linked with a restructuring. Therefore, an enterprise accounts for a curtailment at the same time as for a related restructuring.