Originally Posted by
Always Flyin
They are allowed to search for anything on the list of prohibited items for aircraft.
Which is why marijuana was added to the list.
Cite?
That is
not what the OP's cite says.
It says what we already knew: they are only 'allowed' (officially) to search for WEI.
IF they encounter non-WEI contraband (marijuana, for instance) during their authorized search for WEI, then they have to notify LE. They can have ETD technology and explosive-sniffing dogs because explosives are prohibited. They are not supposed to have drug-sniffing dogs, because marijuana (or large amounts of currency) are not WEI, do not present a hazard to aviation security.