She doesn't exactly have CLEARANCE.
The Big Bang Theory Season 2, Episode 8
Howard, the person at fault for you
not getting a security CLEARANCE is me.
The Big Bang Theory Season 4, Episode 7
That's why I was refused CLEARANCE
for a government research fellowship...
The Big Bang Theory Season 2, Episode 1
I'm in breach of my security CLEARANCE.
I'm going to prison.
The Big Bang Theory Season 10, Episode 20
...and probably cost Howard
his security CLEARANCE.
The Big Bang Theory Season 4, Episode 7