LEED-CI 2009 SSc1 Option 2 Path 10

We are attempting SSc1 Option 2 Path 10 for a CI project within a CS registered building. My question is that the form provided for this credit automatically populated 30 sec. as a duration for public lavatory faucets. The CS form automatically populates a 15 sec. duration for public lavatory faucets. So, the CS form meets the 30% requirement, but the CI form does not. In addition, in the LEED-CI 2009 Reference Guide, Table 2, the duration for lavatory faucets is listed as 15 sec., not 30 seconds. I can not find any information in errata, interpretations or on this forum that address this discrepancy. Any information would be appreciated.