In order to increase the impact of Standard 189.1, the IgCC and LEED, an MOU was signed in 2014 by AIA, ASHRAE, ICC, IES and USGBC to align these three efforts. Since then, these organizations have been working to implement the MOU. At the same time, the Standard 189.1 committee has been revising the 2014 standard to reflect new technical information, including the consideration of approaches used in the IgCC that are different from those in 189.1. This presentation will clarify what these organizations have agreed to and how the 189.1 committee is working to support that agreement.