A Material Adverse Change (MAC) clause, also known as a Material Adverse Effect (MAE) clause, is a contractual provision in an M&A agreement that allows one party (typically the buyer) to terminate the agreement or renegotiate its terms if a significant negative event or change occurs concerning the target company or its business between the signing of the agreement and the closing of the transaction. The core of a MAC clause lies in defining what constitutes a 'material' adverse change. This is often subjective and heavily negotiated.
In the Indian context, while there isn't a specific statutory definition of MAC, its interpretation is guided by general principles of contract law under the Indian Contract Act, 1872, and judicial precedents. SEBI regulations, particularly concerning takeovers and listed entities, also implicitly acknowledge the importance of such events in deal certainty.