Vitalii Vodolazskyi/Shutterstock Save for later Print Download Share LinkedIn Twitter With the Inflation Reduction Act (IRA) marking its first anniversary this week, clean-hydrogen proponents are left with perhaps the most unanswered questions about how to benefit from the law's generous incentives, stoking uncertainty in the still nascent sector. The law required the Treasury Department to issue rules within one year of the legislation's passing detailing what types of hydrogen projects are "clean" enough to claim the IRA's full $3 per ton production tax credit. It now appears full guidance will be delayed until September or later.