Active clearance= you have a cleanrace and are in a job requiring one, so you are eligible to access classified information.
Current/inactive= you have had the investigation done and are still within the window of eligibility but are not currently in a job that requires a clearance. So while you meet all other requirements and your last investigation is still valid you can't access classified information because your not in a position requiring access. Sometimes a position requiring access is as simple as holding a specific rank that blanket requires it. So if you retire it goes current/inactive
Lapsed/experied= start over from scratch if you want a cleanrce again. If your current/inactive clearance goes 24 months without reinstatement, or you hit the mandatory renewal date first, your clearance is lapsed.
So who approved a cleanrace will depend on a lot of things. If he left the service with a fairly recent reinvestigation/renewal then barring going to a new position that required a cleanrace his clearance would be listed as current/inactive for up to 24 months and eligible for reinstatement without a new investigation.
I am seeing his retirement date listed as August 2014, but I am not clear if that was his date he left the position or his actual effective retirement date from the service. It can take anywhere from a few weeks to a couple months to process out as a retirement, then you are still on terminal leave until any leave you have accumulated is done. So it's possible that he could have not officially retired until mid November which would leave him eligible for reinstatement without a new investigation if the transition team requested it.
If he did have to renew and didn't disclose all those contacts it's a definite problem for him. And I wouldn't want to be the OPM investigator who handled it either.