Due diligence on users

Please rate which of the below best characterises the due diligence that new users undergo to operate in the FTZ:

(1) Users subject to due diligence to rule out links to known criminals.

(2) Users subject to due diligence but it does not check links to known criminals or is only superficial.

(3) Users not subject to due diligence or one can sub-rent space in an FTZ without it.