When the government funds energy research and development projects, it normally requires the outside companies or groups receiving the money to pay part of the cost themselves — that's called cost-sharing. The Department of Energy has the power to waive or lower that requirement in certain cases, letting recipients get federal funding without kicking in as much of their own money. This bill doesn't change that power — it just requires the Department of Energy to start reporting to Congress, within 120 days and then every three months after, on when and how often it's been using that waiver authority, so lawmakers can track it.