Either somebody (USTR?) can't spell or this is a great pun or Freudian slip.
"Intercession" usually has religious significance, i.e. see here and here, i.e. in the sense of mediating between two parties who can't agree, which seems to be the situation these days between the US and the EU over ACTA, which both parties are pursuing with religious-like fervour but also with fervent disagreement over just how excessive and aggressive the agreement should be.
Whether this will be an "intercessional" or "intersessional" meeting, apparently the meeting will be only between the USA and the EU, with the less important countries, in their view, such as Canada not invited.
Speaking of religion, I guess that "They also serve who only stand and wait..."
HK

