Based on the USGBC homepage, I had been telling people last night that the comment period closes today at 9 a.m. EDT. However, I received the following communication thiis morning from USGBC:
Despite our efforts to widely communicate the one-week extension for third public comment, overnight we heard from a few folks who  thought they had all of Tuesday, rather than the 9 am EST cut-off we had communicated.  Since it won’t materially affect the schedule, we’re extending the cut-off until 5 pm EST today, March 27, 2012.