From the BBC:

President Pervez Musharraf has signed into immediate effect measures to increase control over the media.

Current regulations related to television have been extended to the internet and mobile phones.

Some regulations on who is allowed to be licensed to broadcast in Pakistan have been extended to cover "any foreign non-governmental organisation".

Gen Musharraf has been highly critical of the media in recent weeks over its coverage of opposition protests. ...

The amended media regulations were changed on Monday because "circumstances exist which render it necessary to take immediate action", a government statement said.

Broadcasters and cable distributors who break the rules could have their premises closed down.

Non-print media in Pakistan is regulated by the Pakistan Electronic Media Regulatory Authority (Pemra).

Pemra will now also be able to suspend the licence of an offender.

Talat Hussein, the director of news for one leading station, Aaj TV, told the BBC: "The government is getting frustrated... and the messenger is being killed for the message."

He was critical of Gen Musharraf for pushing through legal amendments at a time when parliament is not in session.

"It's a repressive law and it's very clear that the government does not want any visuals on the TV screens which are against its policies," Mr Hussein said.

Regulations previously only applying to 'direct to home' television services will now apply to 'IPTV, Mobile TV' (video content on the internet and TV on mobile phones).

The new rules also extend the restrictions on foreign broadcasting in Pakistan. Until now there were bans on non-Pakistanis and foreign companies.

Correspondents say it is not yet clear what this new clause will mean in practice.