i'm not LE, i just play with them. i honestly don't know.
i don't worry about where LE can / can NOT carry, but more where i CAN carry.
based on my experience, Federal LEO's can pretty much carry anywhere if they are performing their duties... for personal use, not so much... but then the LEOSA may or may NOT kick in...
INAL... my interactions and experience say that federal credentials will pretty much get the holder a free pass CC-ing... however, if the person was going on vacation to FL via Jet Blue, they'd have to check their firearm just like anyone else..... -but who knows, they may have a super secret squirrel method of bypassing the nudie machine or something...
**based on actual conversations / interactions** the real truth is probably different.