the standing orders do not include crossing a recognized international border.
Obama himself had to make/approve that specific order. If he did not grant cross-border authority, he de facto denied help to the consulate in Benghazi.
That statement that they (the WH) did not deny a request for rescue is heavily parsed.
“Mr. President we are ready to go on your signal”
“OK, I’ll let you know when...................” 8 hours pass.....and nothing was denied.