The latest set of options that the parties appear to be considering, per a draft decision document by the chair of the Kyoto Protocol amendment working group, include provisions regarding provisional application of the amendment, carry-over with various limitations of AAUs and CERs (original Annex B credits from their first commitment period as well as CDM credits), and three versions of a new Annex B.  The paper is dated Dec. 5, so it appears to be the latest.  See here:  http://unfccc.int/resource/docs/2012/awg17/eng/crp03.pdf