The Central Board of Excise and Customs vide Notification no. 74/2017 – Central Tax dated December 29, 2017 has appointed February 01, 2018 as the date from which the provisions of E-way bill shall come into force.
Read more at: http://www.cbec.gov.in/resources//htdocs-cbec/gst/notfctn-74-central-tax-english.pdf