The contract shall set the amount of compensation to be paid to the contractor and the designated method and timing of payment. The contract shall state that the contractor shall be required to submit an itemized fee voucher. The voucher must be approved by a member of the appointing authority prior to being forwarded to the county financial officer for approval and payment. The contract shall also specify how a contractor is to be compensated for cases assigned but not disposed within the term of the contract as provided in §174.19 of this subchapter.