Question: We have submeters to all of the resident spaces in our community for sewer and water. But common area sewer/water was not submetered. We would like to do so now. We are planning to look at the trailing 12 months' numbers in each of these three categories, and dividing those numbers by 12 months, and then dividing those number by the number of sites in our community (175). So my question is: How much notice do we have to give our residents in order to pass this amount thru to them?