Immigration Judge's finding as to likely future danger was a finding of fact that could only be reviewed for clear error; the agency erred by reversing de novo.
Subsequent statute holding that a certain agency is the only authority to issue a certain visa under that article operates as a context-specific enhancement to an earlier statute authorizing the issuance of the visa by other authorities.
http://media.ca11.uscourts.gov/opinions/pub/files/201514569.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.