the title of the article itself is referring to those working within the WH and their interim security clearances. There is no such thing as a "WH security clearance".
Also, those on the interim clearance essentially got bumped down a level until their background checks are complete.
http://gogovernment.org/how_to_apply/next_steps/security_clearance.php
I also believe the DOE has their own versions.
Edited by Sal at 10:39:33 on 03/16/18