Nordic consumer regulators are to review a challenge made against Apple and current restrictions on songs downloaded from the iTunes music store.

At a meeting in Iceland on Thursday, the Consumer Ombudsmen decided to have lawyers review responses from Apple before deciding whether to pursue any potential legal action.

Apple responded to concerns earlier this month by sending a 50-page document to the Norwegian consumer agency explaining itself.

"Our lawyers will come together and discuss how to argue against the replies we got from iTunes," Norwegian Consumer Ombudsman Bjoern Erik Thon said after the meeting. "If they do not come up with any better arguments or if they don't try to come up with a settlement, I am still ready to try this case."

Nordic regulators are concerned that the iPod is tied to iTunes and that other rival MP3 players cannot use iTunes software or store. Thon believes if the case is brought before the Norwegian courts officials and the consumer agency wins then Apple may be forced to open iTunes Music Store up to other MP3 players. A meeting is planned between Nordic regulators and Apple representatives in late September.