Sen. Bernie Moreno (R-OH) is proposing an audit of whether insurance companies are using federal tax dollars to cover abortions, a legislative compromise meant to jump-start negotiations over enhanced Obamacare subsidies.

The proposal, which would vet the companies’ compliance with the Hyde Amendment, was tucked into bill text that Moreno shared with the rest of an Obamacare working group on Wednesday and would include a “penalty system” for insurers who run afoul of the law.