Excise exemption for briquetting machinery enables duty-free manufacture of briquettes from agricultural and municipal wastes. The Central Government exempts briquetting plant and machinery classifiable under heading No. 84.79 intended to manufacture briquettes from agricultural and municipal wastes from the whole of the duty of excise leviable on that machinery as specified in the Tariff Schedule, the exemption being exercised under statutory power on grounds of public interest.