A system development charge (SDC) for the Medford Regional Water Reclamation Facility (RWRF) shall be imposed on sewer users at the time of increased usage of the RWRF in accordance with the resolutions of the Regional Rate Committee establishing a methodology and a schedule of charges, subject to the exemptions set forth in Section 3.846. The charge may consist of a reimbursement fee, an improvement fee or a combination of the two. SDC rates for the RWRF are established in the most recent fee schedule approved by resolution of the City Council.