The Companies Amendment Act, 2017 was passed by the Rajya Sabha in December 2017 and received presidential assent in January 2018. The amendments will come into force on dates notified by the Ministry of Corporate Affairs. This article summarizes the key amendments made to section 2, which defines terms used in the Act. Some of the important changes include expanding the definition of "associate company", including cost accountants in practice in the definition of "cost accountant", and increasing the limits for paid-up capital and turnover to qualify as a small company.