The client must provide the agency with a minimum (24) twenty-four hour notice in case of any cancellation of the scheduled activity. A (4) four-hour minimum charge will be imposed for each investigator if the client fails to give (24) twenty-four hour notice to the agency. Emergency cases ( short notice) less than (24) twenty hours from notice to initiation of the case will be billed at one and one-half times the hourly rate. Client wishes to cancel this investigative services agreement once the agency has begun or scheduled such services, that an amount equal to one-half of the retainer fee shall be paid. Client shall give 48 hours minimum to start any case.