The video alleges that Union Minister Nitin Gadkari's promotion of ethanol policy is linked to his sons' businesses, who became managing directors of ethanol-producing companies in 2016 and 2017, respectively, and that a 2018 amendment to the Prevention of Corruption Act made it harder to investigate such cases by requiring prior government approval for CBI inquiries.

Sarang Gadkari was appointed as a Whole-time Director of Manas Agro Industries & Infrastructure Limited on June 15, 2016, not specifically as the Managing Director. Nikhil Gadkari was indeed appointed as the Managing Director of Cian Agro Industries & Infrastructure Limited, effective January 1, 2017, with the board approving his appointment on January 25, 2017.

Nitin Gadkari has consistently promoted ethanol blending and related policies, making statements in Parliament and public forums. However, the search results do not indicate that he introduced a specific 'ethanol bill' in 2018 that passed.

The 2018 amendment mentioned in search results refers to the Prevention of Corruption Act. The Prevention of Corruption Act, 1988, defines criminal misconduct by a public servant, which includes obtaining pecuniary advantage by abusing one's official position, and the CBI is the primary agency for investigating such cases.

The Prevention of Corruption (Amendment) Act, 2018, introduced Section 17A, which mandates prior government approval for any inquiry, investigation, or inquiry against a public servant for alleged offenses related to their official duties. While there is a Code of Conduct for Ministers that addresses disclosure of family business interests and potential conflicts, the Prevention of Corruption Act primarily focuses on the actions of the public servant constituting criminal misconduct, rather than a blanket prohibition on family involvement in private businesses. [1][2][3]