This action finalizes several changes intended to provide further opportunity for expanding the production and use of renewable fuels under the RFS program and to reduce burden for regulated entities. This action allows renewable feedstocks that have been partially processed at one facility (commonly referred to as biointermediate feedstocks) to be fully converted into qualified finished renewable fuel at another facility. This action also includes the addition of several new feedstock and fuel pathways and makes numerous other revisions and technical corrections to the RFS and other fuels programs. Finally, this action implements quality specifications for fuel blends containing 16 to 83 volume percent ethanol. This would provide additional flexibility for ethanol flex fuel (EFF) producers to support distribution and use while continuing to ensure EFF quality is consistent with current vehicle emissions control system needs.