The U.S. Postal Service published a rule requiring states to provide lists of voters who receive mail-in ballots, including their names, addresses and unique tracking information.

The rule was created to align USPS procedures with President Donald Trump’s March executive order concerning mail-in voting and election security.

However, the rule cannot currently take effect because a federal judge issued an injunction blocking the relevant portions of Trump’s executive order.

The judge ruled that provisions involving USPS and mail-in ballots were unconstitutional, and the injunction was renewed in July following a lawsuit by the League of Women Voters of Massachusetts, Fox News has reported.

The rule could affect the upcoming midterm elections only if a federal court lifts the injunction, while the Trump administration continues to defend the policy as necessary to ensure election security.