Deduction of HCT. For each shift off, any employee approved to use HCT will have accrued hours deleted from the employee's accrued holiday pay/HCT in 12/24 hour increments and will receive no pay or other prorated monetary benefits for such holiday compensatory time, except as provided below for payment for unused HCT. The accounting of the deletion of 12/24 hours of accrued compensatory time per shift of the requesting employee will be the sole basis for payment of the relief employee at no additional cost impact to the City. The exception to the hour increment is emergency callback, which will be treated in the same manner as shift trades.