EC3 Presentation - The Why and How

This is awesome. Thanks for hosting and making it available to us, I just registered. Columbia's Commitment to Sustainable Building Practices (attached) Materials section refers to EC3, GWP limits for Buy Clean California Act, and language from the GSA Green Building Advisory Committee Advice Letter: Policy Recommendations for Procurement of Low Embodied Energy and Carbon Materials by Federal Agencies. If I may submit a few questions in advance :) , I'm very interested in learning how EC3 might play a role in these cases:

• Determine the carbon footprint of concrete and steel in projects, at a minimum, & share results 
  with the design team and client.
• Work with the client, design team, subcontractors and vendors to follow maximum acceptable 
  Global Warming Potential (GWP) limits for identified materials in the Buy Clean California Act, 
  regardless of project location
• Work with the client, design team, subcontractors and vendors to select materials with 
  environmental product declarations for 75% of materials used (by cost or weight), and that their 
  emissions fall in the best-performing 80 percent of global warming potential (GWP) among 
  functionally equivalent products as demonstrated by environmental product declarations (EPDs). 
• Work with the client, design team, subcontractors and vendors to develop a whole building life 
  cycle assessment approach for larger projects (over $3.095M), requiring designing a building in 
  such a way that life cycle carbon assessment shows that the selected design results in a 20% 
  carbon reduction, compared to a baseline building.