What rule requires the entire gross floor area to be certified under a single rating system?

• A. LEED Volume
• B. LEED Green Building Reference Guide
• C. LEED Certification Rule
• D. LEED BD+C

Answer: (C)

The concept being tested is that a LEED project must have all of its gross floor area certified under a single rating system. This is defined by the LEED Certification Rule, which says the entire project should be evaluated and certified using one chosen rating system rather than splitting parts of the building into different systems. This keeps the certification coherent, with all credits and performance measured against the same set of criteria for the whole project.

Other items describe different things: LEED Volume is a portfolio pathway for certifying many buildings under one umbrella, the LEED Green Building Reference Guide is the official manual used to navigate credits and processes, and LEED BD+C is just one of the rating systems. None of these specify the requirement that the entire gross floor area be covered by a single rating system like the LEED Certification Rule does.