All mention of establishment periods refer to the no potable water/irrigation case (WEc1 Option 2), but what about for Option 1, 50% non-potable water use reduction?

If a 50% reduction in potable water use for landscaping is demonstrated using the LEED calculation or WaterSense Water Budget Tool* (WEc1 Option 1), is it acceptable to include additional temporary irrigation for 2 years** for the purpose of establishment? 

*LEED Interpretation ID#10440

**The 2 year establishment period for Option 2 is from CIR 1311.