Employees working in the classification Superintendent-Waste Disposal and Foreman-Waste Disposal as of May 31, 2012, in addition to other compensation provided in this Title of the Code, shall continue to receive "Weekly Unlimited Refuse Incentive Pay" (currently eighty-four cents ($.84) per hour unless mutually negotiated to make changes hereto). Employees who are hired into, promoted, transferred, or recalled to these positions after May 31, 2012 will not receive the Weekly Unlimited Refuse Incentive Pay.