Commonwealth Judge Bernard L. McGinley issued an order in Harrisburg extending the preliminary injunction against the voter ID law until he makes a decision on a permanent injunction.
The American Civil Liberties Union, which fought the voter ID requirement in court, said the decision on a permanent injunction is separate from Friday's ruling. McGinley is not expected to rule on a permanent injunction until later this year.
McGinley's order also changed the "soft rollout" process for implementation of the law, taking out the requirement poll workers must tell voters they should be prepared to show proper identification at future elections, the ACLU said.
Poll workers still can ask voters to produce identification, but voters are not required to do so. The voter ID requirement was included in preliminary injunctions issued by another state judge in 2012 and earlier this year.
"We are very pleased that hundreds of thousands of eligible voters will be able to cast ballots in upcoming elections regardless of whether or not they have required identification," Jennifer Clarke of the Public Interest Law Center of Philadelphia, said in a statement.
Clarke was a member of the plaintiff's legal team.
Seventeen states have enacted laws requiring the presentation of some type of government-issued photo identification, such as a driver's license, before voting.