Ofcom has been handed the task of discovering if the parts of the Digital Economy Act intended to block sites providing illegal content can be blocked.
One of the main anti-piracy weapons in the Act is the ability to use the courts to block websites deemed to be dedicated to copyright infringement.
The Culture Secretary Jeremy Hunt has asked Ofcom to have a look at the practicalities of using the courts to block sites raising the prospect that they could be toned down if deemed to be unworkable.
"I have no problem with the principle of blocking access to websites used exclusively for facilitating illegal downloading of content. But it is not clear whether the site blocking provision in the Act could work in practice so I have asked Ofcom to address the question," he said.
"Before we consider introducing site-clocking we need to know whether these measures are possible," he added.
Ofcom is currently getting ready to launch the mass notification system, which writes to those users that are downloading illegal content.