As we’ve previously reported, EPA’s 2021 annual biofuel required volume obligations (RVO) rule has been at the Office of Management and Budget since 13 May undergoing review. That rule is likely to be issued soon, and after that the anticipated 20.17 billion gallon RIN equivalent volume rule, of which 15 billion is ethanol. EPA is now indicating that it is likely that a supplemental RVO will come later in the year.   The supplement is expected to be another 250 million gallons, to be matched by a second supplemental rule in 2022 to make up for the 500 million gallons of conventional ethanol from 2016 which the courts ruled EPA had waived incorrectly. That would make the effective ethanol RVO 15.25 billion gallons for...