I am a little confused here:
Credit language states the following:
• Meter fixtures and fittings and record metered data for one year to establish a water-use baseline.
• For projects with at least 80% of fixtures and fittings metered, show that the water-use baseline has been maintained

So does this mean that i take 12 months of data already recorded and compare it to 12 months during the performance period. If performance period + 12 previous months I satisfy it?