His rating has lapsed, whatever play on words you want to use, he needs to do a test with an examiner renew or revalidate makes little difference at this point other than a play on words....
renewal |riˈn(y)oōəl|
noun
the action of extending the period of validity of a license, subscription, or contract : the contracts came up for renewal | a renewal of his passport.
• an instance of resuming an activity or state after an interruption : a renewal of hostilities.
• the replacing or repair of something that is worn out, run-down, or broken : the need for urban renewal.
• (among charismatic Christians) the state or process of being made spiritually new in the Holy Spirit.