Refinery exemptions are back at the center of the Renewable Fuel Standard, and this time Environmental Protection Agency (EPA) wants the gallons to stay in the system. Speaking in Peosta, Iowa, EPA Administrator Lee Zeldin proposed revisions to the RFS Set 2 rule that call for 100% reallocation of additional 2025 small refinery exemption volumes.
The mechanics are simple. If EPA grants additional small refinery exemptions for 2025, the associated gallons would be reassigned rather than allowed to reduce the aggregate renewable fuel requirement. EPA said the revisions preserve "historic and necessary volumes," keeping headline demand in place while the agency continues to process exemption relief for qualifying refineries.
That changes where compliance pressure lands. Full reallocation keeps blending demand in the broader market, supporting renewable fuel production economics and crop-linked demand signals, and it shifts compliance exposure away from exempted small refineries and back across the remaining obligated pool. Exemptions, under this approach, no longer translate into lower overall 2025 renewable fuel demand.
Zeldin framed the revisions as a way to "increase target markets for American farmers," tying a technical compliance adjustment to corn, soybean oil and rural processing demand. For ethanol and biodiesel producers, the framing repeats a familiar argument: the value of the RFS is not only the number printed in a rule, but whether those gallons survive waiver decisions, exemption petitions and compliance adjustments.
For small refineries, the proposal keeps the door open to exemption relief while changing what that relief means for everyone else. If EPA finalizes the reallocation approach, exempted volumes would not disappear from the national obligation. The SRE debate becomes a distribution question: who carries the obligation, how renewable identification number, or RIN, demand is absorbed, and how obligated parties position themselves ahead of final volumes.
A full reallocation policy also makes the renewable fuel requirement more durable, which affects planning for blending economics, supply contracts and compliance procurement. It narrows the gap between the statutory intent of the RFS and the practical effect of refinery exemptions, a gap that has long driven disputes among refiners, biofuel groups and farm-state officials.
The announcement sits inside EPA's broader Set 2 rulemaking, the phase of RFS volume-setting that determines future renewable fuel requirements outside the earlier statutory schedule. The agency's focus on additional 2025 SRE volumes puts exemption handling inside the effective mandate rather than beside it. The reallocation percentage determines whether waived obligations remain in the fuel pool or leave the market entirely.
Farm groups and biofuel producers have pressed for stronger protection against demand erosion from exemptions, while small refineries have argued for relief from compliance burdens. EPA's Iowa message puts the proposal on the farm side of that split, with "100% reallocation" as the operative phrase and "historic and necessary volumes" as the policy justification.
Several details remain open in the rulemaking, including the exact 2025 SRE gallons covered, the final RFS volume tables, the implementation schedule and how EPA handles compliance timing.
