The Shadow Deputy Prime Minister has called for the implementation of the Digital Economy Act.
Harriet Harman MP said the legislation - which is designed to protect rights holders and guard against online copyright infringement - must be brought into force, reports ISPreview.co.uk.
The controversial act entered the statute books during the final days of the Labour government in April 2010.
At the time, critics said the bill had been subject to insufficient scrutiny in the House of Commons, while concerns were also raised over its compatibility with European law.
Broadband providers BT and TalkTalk are continuing to fight for a judicial review of the Digital Economy Act, meaning the future of the legislation remains in doubt.
But Ms Harman, who served as deputy to former Prime Minister Gordon Brown, said the government should provide a clear timetable for implementing the act.
The coalition needs to make progress on the notification letters set to be mailed to offenders, and also publish the Ofcom code of practice, she claimed.
Ms Harman called on the government to set a deadline for agreement in the industry for site blocking, search engine responsibility and digital advertising.
"The music industry - and other creative industries - says that if the government got a move-on, they could do this by May this year," she added.