Subject to subsection (b) of this section, property reserved by the Charles County Planning Commission under § 9–805 of the Land Use Article is not subject to property tax. The Commission shall notify the Charles County Supervisor of Assessments when land is reserved and when land is released from reservation. The notice to the Supervisor shall identify the land that has been reserved or released from reservation. The exemption under this section shall be: effective beginning with the first taxable year after the date on which the Supervisor receives from the Commission notification of the reservation; and terminated beginning with the first taxable year after the date on which the Supervisor receives from the Commission notification of the release of the reservation.