 All tenements in a new valuation list, including those subsequently assessed by interim valuation, will be assessed by reference to a valuation reference date to ensure uniformity in assessment levels and fairness to all ratepayers.This valuation reference date is designated by the Chief Executive.The practice since 1999 has been to designate the valuation reference date as 1 October in the year preceding the date on which a new valuation list is to take effect.