A Class C instruction permit is valid for twenty-four months from the date it is issued
DMV does not send you a notice when your permit is about to expire.
If your instruction permit is expired or about to expire, you may apply for another permit. The new permit is valid for twenty-four months from the date it is issued.
To apply for another instruction permit, you must surrender your instruction permit and follow the instructions in the section: To Qualify/Apply
. You are not required to take the knowledge test unless your permit is expired for one year or more.