Contractor’s Termination, Alteration, or Rescheduling of Services. Cancellation, alteration, or rescheduling of police officer services by the Contractor for a specific date must be made at least ten (10) hours prior to the scheduled start time for that date. If Contractor fails to provide ten (10) hours advance notice from the scheduled start time, Contractor will be billed for a minimum payment of four (4) hours per officer scheduled for that date in accordance with Section II.A. above. Cancellation, alteration, or rescheduling notification can be made by phone or email.