I have reached out to the AIA staff members that I work with on the Energy Leadership Group (AIA ELG) to see about getting into the cycle of updating these standard documents. Another member of the ELG, architect Kjell Anderson of LMN in Seattle, is interested in working with us on this effort, as he has started including Standard 209 language in his firm's consultant agreements.
The ugly news is that AIA updates its suite of Contract Documents on a ten-year cycle, and the current set of docs is the 2017 version. So, unless something out of the ordinary happens, a revision that includes a reference to Standard 209 might not appear until the 2027 versions.
One thought that Kjell and I have discussed is that we could generate a few Standard 209 paragraphs that we could distribute via the Green Gurus forum for review, comment and adoption.