Restrictions for student work permit

Hello, everybody! My name is Dima. I do study in Iceland and about to start to work.
I have checked for vinnumalastofnun, velferdarraduneyti and utlendingastofnun websites on information about restrictions for student work permit and couldn't find anything.
Could you, please, be so kind and help me with some links with information showing what hours students allowed to work and other restrictions for such permit.

Best regards,
Dima

For students from outside EU/EEA I think it is 20hours a week.
You should be able to find informations about this
on mcc(dot)is , island(dot)is  and utl(dot)is   
If you don't find anything there, try to contact UTL by e-mail.

Thank you for your reply, Kristinn