Chris Nelson in the national treasure that is The Nelson Report has the crucial backstory on how Administration hardliners may be fighting efforts to lift Treasury sanctions on North Korea’s “licit” funds as part of an effort to scuttle the nascent Six Party agreement:

Had we reported last night, we would have used a quote from a very senior, closely involved source who was frankly worried that hard-liners known to oppose the Feb, 13 deal worked out by A/S Chris Hill had apparently prevailed on Treasury to renege on a key section of the Feb. 13 declaration.

IAEA director ElBaradei certainly was concerned, and said so, while in Pyongyang to start the promised actions at the Yongbyon nuclear complex.

[snip]

Still, observers in and out of State were shocked at the very firm declaration by Treasury that even though the Ernst & Young audits completed last October had apparently found nothing to confirm the various charges, as of yesterday, Treasury firmly stated that each and every one was proven beyond doubt.

And so since many observers, in and out of State, had thought both they and Pyongyang were being told that the DPRK would see Treasury “complete action” yesterday…with some indication that would mean a lifting of US sanctions on the DPRK-related banks…Treasury’s firm declaration that US banks would continue to be banned from anything to do with the DPRK seemed to raise the specter of a broken deal.

Waiting 24 hours produced a grudging consensus that, once again, the deal or deals cut back-channel between Hill and DPRK negotiation Kim Gae-gwan may have included the possibility of greater flexibility and understanding on the part of Pyongyang than might have been expected, and which all of us clever analysts had divined.

[snip]

Maybe…some of our experts are frankly skeptical at the rosy scenario offered above, and warn that “Hill is going to have to practice some very adroit diplomacy to keep this from getting more difficult, just when we thought it might start to move.”

One expert … warns “When Hill says, ‘I think we will get ourselves into a situation where BDA will not pose a stumbling block to the six-party process’, what he really means is he we’re not at a stumbling block yet.”

Chris has way more detail, but for that you have to have a sweet hook-up.

For more on the Ernst & Young audit that “found no evidence” that Banco Delta Asia “facilitated North Korean money-laundering,” see Kevin Hall’s excellent story for McClatchy.

Late Update: Treasury has posted the full text of its final rule prohibiting “U.S. financial institutions … from opening or maintaining correspondent accounts for or on behalf of BDA” barring “BDA from accessing the U.S. financial system, either directly or indirectly.” (press release, final rule)