[kick]

The FBI stands for "The Federal Bureau of Investigation." "The FBI's policy," as such, is grammatically correct.

English isn't a common language in Poland, is it?

[uryga]

my english is fine, thanks. my point was: splicing the expansion of "DUI" into a sentence will often make it ungrammatical, but that doesn't matter, because the acronym functions as a separate thing. analogously, expanding "an APL" into "an <A Programming Language>" and calling it incorrect is a weird way to judge a sentence.

anyway, i guess i was just in the mood to argue about something pointless online! have a nice day :)