The current interest rates required on customer deposits are higher than justified by current credit and capital markets. The minimum interest rate is changed to 2 percent per annum, and to 3 percent per annum for non-residential customers when the utility elects not to refund such a deposit after 23 months. Currently, the minimum interest rates are set at 6 percent and 7 percent per annum, respectively. The utilities must apply the revised interest rates within 45 days of the effective date of the rule.