TalkTalk and BT have been granted judicial review of the Digital Economy Act by the High Court.
A judge will now scrutinise whether the act is legal and justifiable, and could make wide-ranging recommendations.
BT and TalkTalk argued that the legislation had been “rushed through parliament” before the election.
Internet service providers (ISPs) are unhappy with the part of the act that requires them to take action against suspected illegal file-sharers.
Depending on the judge’s ruling, the government may be forced to change or even scrap the legislation.
Read More/Source: BBC News