Chapter VI Final Provisions Article 28. Obligation of incorporation until 2014 Datau 1- Without prejudice to the provisions of article 11, incorporators are obliged, until the end of 2014, to incorporate a minimum value of 6.75% by volume of biodiesel in the diesel used in the land transport sector. 2- Biodiesel is understood to be the biofuel substitute for diesel, whose specifications are provided for in standard EN 14214. Revoked by Article 10 of Decree-Law No. 152-C/2017 - Dirio da Repblica n. 236/2017, 2nd Supplement, Series I of 2017-12-11, effective from 2018-01-01