By December 7, the County shall notify the municipal corporation of the County's determination regarding the degree to which the municipal corporation is providing one or more eligible services in lieu of the County. Any disagreement shall be subject to negotiation between the County and the municipal corporation. If the County and the municipal corporation are unable to agree on the degree to which the municipal corporation is providing one or more eligible services or programs by January 15, the matters in dispute shall be submitted to an Arbitration Panel. The deadline may be extended by mutual agreement. The Arbitration Panel shall be comprised of the following: One member selected by the municipal corporation involved in the dispute; One member selected by the County Executive; One member selected jointly by the above members. At the arbitration hearing, the County and the municipality may present testimony, evidence, and oral argument as to the matters in dispute. The Arbitration Panel shall issue its advisory determination to the County Executive and County Council no later than February 15.