What are the driving restrictions on an interim California drivers license?

Person is 18 yrs old

The only restriction I can find is that you carry the interim license with you until the real one gets there. From The California DMV:

"After you pass your driving test you will be issued an interim license valid for 90 days until you receive your new photo license in the mail. Double-check your address before you leave DMV and tell the DMV representative if you have moved or if your address is incorrect. If you have not received your license after 60 days, call 1-800-777-0133 and they can check on the status for you. Have your interim license with you to provide information when requested.

http://www.dmv.ca.gov/dl/dl_info.htm